%% This list of examples has been alphabetized. Please add your example in the proper place. Thanks!
[[AC: ''Franchise/AceAttorney'']]
* Practically the whole cast of [[https://www.fanfiction.net/s/11281809/1/Phoenix-Wright-Ghosts-of-the-Past Phoenix Wright: Ghosts of the Past]], when they decided to let Maya channel Dahlia. Considering that because of Dahlia's haunting Iris was at the verge of [[BreakTheCutie mental breakdown]] and they were desperate for solution chanelling itself is understandable, but they had only taken precautions against Dahlia escaping, rather than from her trying to kill them, and what's more they did it in a ''kitchen''. Phoenix, Maya and Athena almost got killed, and no one present got out of it without any injuries. Summarised by Dahlia herself:
-->'''Dahlia:''' I don't know what the hell convinced you it was good idea? You had to know this is how I'd react! You gather everyone I hate in the same room and summon me? And you don't even have backup plan?!

[[AC: ''WesternAnimation/AdventuresOfTheGalaxyRangers'']]
* PlayedForLaughs with the narrator in Bruinhilda's ''[[WesternAnimation/AdventuresOfTheGalaxyRangers Galaxy Rangers]]'' story [[http://bruinhilda.dreamstation.com/fanfic/twt1.html "The Trouble With Tortuna"]]. He voluntarily ships off to the worst WretchedHive in the galaxy, one where humans are banned because it's controlled by [[GodSaveUsFromTheQueen The Queen's]] forces. Any human caught by the Crown will have their LifeEnergy stripped from them and [[PoweredByAForsakenChild turned into a Slaverlord]]. The reporter goes there, gets ridiculously intoxicated, then interferes several times when the Rangers show up and try to bail his ass out.

[[AC: ''Manga/AhMyGoddess'']]
* When several gods in Heaven was making a porno (under the belief that begging for such from Hell was disgraceful) in ''[[http://anime.adult-fanfiction.org/story.php?no=600055428&chapter=2 The Vain Rose's Garden]]'', they decide not to include Urd, claiming that doing so might get Tyr or Hild after them. While a reasonable claim, they did so ''after'' shooting her scene. While nothing is proven, Peorth nonetheless notes that most of the gods involved in the filming disappeared "under mysterious circumstances" over the following years.
** Later, one of a pair of demons hired to turn Urd into a demon tries to rape her while she's unconscious. His partner understandably freaks out, [[PragmaticVillainy not out of any moral objection]] but because rape in general is heavily punished in Hell and raping Hild's daughter is the kind of idiocy that would turn them into a cautionary tale to keep other demons from misbehaving for the rest of eternity.

[[AC: ''TabletopGame/BattleTech'']]
* In {{Fanfic/Fragmentation}}, a [=ComStar=] [[TheMole mole]] is wanted in four out of the five Successor States for [[PaedoHunt child molestation]]. That's bad enough. But what qualifies him for this trope is that in the Draconis Combine, his would-be victim was ''a member of the ruling Kurita family''.
---> '''Broker''': I was aware Kneiss was stupid from your briefings, but I was under the impression the genetrash still had [[LampshadeHanging some basic survival instincts.]]

[[AC: ''ComicStrip/CalvinAndHobbes'']]
* PlayedForLaughs in ''Fanfic/CalvinAndHobbesTheSeries'':
--> '''Tiger Eye:''' Everyone get back! You're all in danger! Run to safety!\\
(The crowd moves into the street, where they're immediately hit by a truck)

[[AC: ''Anime/CodeGeass'']]
* After being sent back in time in ''[[https://www.fanfiction.net/s/12151205/1/God-s-Gambit God's Gambit]]'', Lelouch makes a point of warning the Blood of the Samurai that Britannia knows where they are and that Cornelia will becoming for them first as they're the largest resistance group they have a definitive location for. Despite this and one of their leaders insisting that they should take steps to prepare, the majority decides to instead "die with honor". The lone dissenting leader calls them out on the fact they're simply too proud to accept help from someone who's accomplished more in a week than they have in seven years and leaves, taking several of his subordinates with him.

[[AC: ''VideoGame/CommandAndConquerTiberiumWars'']]
* In ''Fanfic/TiberiumWars'', the Brotherhood of Nod considers [[RapeIsASpecialKindOfEvil sexual assault]] to be an "[[EvenEvilHasStandards offense against]] [[DarkMessiah the Messiah]]" and therefore a capital crime. At least one Nod soldier apparently didn't read up on the rules, because he attempts to rape a GDI prisoner while one of the [[WarriorMonk Black Hand]] is in the next room. An ''epic'' [[NoHoldsBarredBeatdown ass]]-[[PunctuatedPounding beating]] [[DestinationDefenestration ensues]].
** There's also a Nod soldier on the cordon around the White House who is reprimanded for not properly checking an incoming convoy because they're in Nod buggies and Reckoners -- this despite the fact that DressingAsTheEnemy and the EnemyExchangeProgram are time-honored traditions in both gameplay and story throughout the ''Command And Conquer'' 'verse. Of course, [[LaserGuidedKarma the very vehicle he neglected to check]] turns out to be a carbomb that incinerates him and his checkpoint.

[[AC: CrossOver]]
* Vulture and Greyback, two griffin soldiers in ''[[{{Fanfic/AceCombatTheEquestrianWar}} Ace Combat: The Equestrian War]]''. The former is outmaneuvered by Firebolt and killed upon crashing onto a column during the battle of Cloudsdale. The latter is fried by The Burning Talon's laser because he is too focused on trying to kill Lightning Bolt. When he finally notices the danger, it's [[FamilyUnfriendlyDeath too late for him]].
* Dave in ''FanFic/DaveStdiderPokemonTraner''. Jake England the evil poacher wheels a ray gun specifically called the "Dave Kill Lazer" past Dave & co. while laughing maniacally. Dave nonchalantly acknowledges this fact and then just ignores the fact that an evil villain has a laser SPECIFICALLY DESIGNED TO KILL HIM. Also he's fooled by Jack and Karkat's false mustaches in Chapter 8, despite the fact that a nameless character (The Ticket Taker Man) notices like, a sentence before.
* In ''Fanfic/KyonBigDamnHero'', Haruhi thinks this of Taniguchi after learning about his ratings. Kyon calling him a 'living perv-wiki' probably didn't help.
* ''Fanfic/LastChildOfKrypton'': Toujiís sister was obsessed with seeing closely a battle between a giant robot and an alien monster. She left the shelter, her brother ran after her, and they almost got killed during the battle.
* Dr. Emil Hamilton in ''[[https://www.fanfiction.net/s/11965672/1/Terminal-Justice-by-Overkill-AKA-Irrational-Intelligence Terminal Justice]]''. While everyone else realizes how bad an idea it is to antagonize [[TheGrimReaper the embodiment of Death]], Hamilton decides to mind control Power Girl into slapping some magical shackles on him. Not only is he already aware of the very real possibility that this would merely prevent people from dying without affecting Death himself, he also knows that Death has a lot of friends in the Justice League, including his girlfriend Supergirl. The end result? Everyone and everything in the universe stops dying ([[FateWorseThanDeath no matter how horrifically injured]]) while Death is in a coma. Meanwhile his siblings cause widespread destruction (among other things, tornadoes started appearing literally everywhere in the world). Unlike many cases of this trope, Hamilton doesn't actually die. Instead he's so horrifically injured his doctors insist he won't be eating solid food for at least a decade; he's left infected with the plague (courtesy of Pestilence) and with all his backers destroyed (War's doing).
* [[Franchise/StargateVerse Senator Kinsey]] in ''[[https://www.fanfiction.net/s/8539844/5/Ship-of-the-Line-An-Unlikely-Hope Ship of the Line: An Unlikely Hope]]'' tries to threaten [[Franchise/StarWars Darth Vader]] (really [[Series/BuffyTheVampireSlayer Xander]] turned into Vader) while on-board the Executor, completely ignoring that not only is Vader a two meter cyborg with a laser sword and magic powers, but is also in command of a ship that (according to Star Wars fans in Stargate Command) could eliminate roughly ''90%'' of humanity in 24 hours with an orbital bombardment.
* In ''Fanfic/ThousandShinji'':
** Shinji hated his father but he decided to forget about Gendo since he'd got a real family (Misato, Asuka and Rei) and friends at last. However Gendo decided to hurt them to try to keep his son in line. Shinji's RoaringRampageOfRevenge was ''terrific''.
** Kaworu introduces Shinji and gives his true nature away at the same time. Shinji attacked him right away.
* In ''Fanfic/ChristianGreyVsPepperPotts'', this trope pretty much ''defines'' [[Literature/FiftyShadesOfGrey Christian]]. One prime example is when he decides to romantically pursue Jennifer Walters, knowing full well that she can turn into She-Hulk. When Jennifer is creeped out by him taking her to a hotel room after picking her up while drunk and runs away, he has her assistant kidnapped. He then expects Jennifer to have a nice dinner in a warehouse, with the threat of the assistant's knees being broken with a sledgehammer if she refuses. By the time She-Hulk is done with him, his spine is broken and it's expected that he'll never move again. (He does recover, but only with the help of a vengeful Asgardian goddess).
* A random biker in ''[[https://www.fanfiction.net/s/8491480/1/Tainted Tainted]]'' first makes bigoted comments about [[Series/BuffyTheVampireSlayer Xander's]] new girlfriend ComicBoook/SheHulk. Then when she tries to play peacemaker between him and Xander, said biker backhands her. Fortunately for him, She-Hulk is willing to TurnTheOtherCheek. Unfortunately, Xander, [[EmpoweredBadassNormal who recently became a Hulk himself]], isn't.
* The [[Literature/HarryPotter Wizarding World]] is this when Harry temporarily returns to Earth in ''[[https://www.fanfiction.net/s/8933408/16/Wizard-Runemaster Wizard Runemaster]]''. In order to punish the goblins for not handing over Harry's wealth, the Ministry of Magic is having radioactive waste poured into their cave systems. Said goblin caves run under most of London and a good deal of Great Britain.
** According to Harry, countless wizards have been killed by summoning a sword or some other type of weapon, then not dodging when it comes flying toward them at high speed.
* In ''[[http://www.tthfanfic.org/Story-27556-2/NimbustheMariner+The+Watchman.htm The Watchman]]'' Warren kills Tara, rapes Willow, and tries to kill [[Series/BuffyTheVampireSlayer Buffy]] despite knowing that Xander has become ComicBook/TheSentry, whose described as "Superman on steroids with more mental problems than Joker". Warren thinks that because his magic orbs let him [[NormalFishInATinyPond fight a Slayer evenly]] he's a match for [[PhysicalGod Xander]] who treated a Hellgod as an annoyance. Xander throws Warren to Greenland, beats the hell out of him, rips off his head, and vaporizes his body. He then drops Warrens head off at the local [[BadGuyBar demon bar]] as a warning to anyone trying to mess with his friends.
* ''Fanfic/GodsAngelsAndKings'': Gendo has a rather dumb moment when he kidnaps Franchise/{{Godzilla}}'s infant child as bait in hopes of luring him to Mount Fuji and killing him with the Evas. [[CurbStompBattle It goes badly for NERV]]. A [[DownplayedTrope downplayed example]], as it was mainly a case of severely underestimating [[PapaWolf Godzilla]] rather than thinking there would be no consequences.
* The [[Literature/HarryPotter Dursley family]] in ''[[https://www.fanfiction.net/s/8527691/27/An-Incomplete-Potter-Collection The Devil Ashikabi]]'' sell Harry to [[Anime/{{Sekirei}} MBI]] and never consider Takami might call Child Services on them.
* A vampire in ''[[http://www.tthfanfic.org/Story-11757-89/Ouatic+Tales+from+the+Barman.htm Tales from the Barman]]'' tries to start a fight (and kill Xander's cat) in Xander's bar despite Xander being a veteran demon hunter. The presence of roughly a dozen [[Series/BuffyTheVampireSlayer Slayers]] either working or drinking makes it even worse.
* Major Silva in Fanfic/GuiltySparks, just like in [[Literature/HaloTheFlood his original appearance]] tries to bring the ''Truth and Reconciliation'' back to Earth while poo-pooing the threat of The Flood aboard the ship. Unlike the original novelization, however, he goes the extra mile and mutinies when [[VideoGame/HaloReach Colonel Holland]] orders him to abandon ship to help [[EnemyMine some rogue Kig-Yar pirates and Batarians]] in taking a ship that wasn't infested.
* ''FanFic/TheInfiniteLoops'': This is the only reason why Billy is categorized as an MLE. He has no ill intentions -- he's just so damn ''[[LethallyStupid stupid]]'' that he's a danger to himself, other loopers, and Yggdrasil as a whole. It is not an uncommon occurrence for Billy to manage to kill himself and several others by accident during a loop through nothing more than his sheer idiocy.
* ''[[http://www.tthfanfic.org/Story-24048-2/BHRamsay+Roanapur+Knights+Learning+Curve.htm Roanapur Knights: Learning Curve]]'' has two noteworthy examples.
** First, a vampire sends thralls after [[Manga/BlackLagoon Boss Chang]]. Boss Chang hires Shenhua to "send a message". It's unknown what exactly she did but one of the local [[Series/BuffyTheVampireSlayer Slayers]] was amazed/horrified said vampire was still alive when she found him.
** Later a [[HornyDevils Succubus]] drains one of Balalaika's men and even after being caught, she brags to Balalaika about how she took her form while having sex with the man. Balalaika has the Succubus' horns, wings, and tail ''sawed'' off then lets the torturer do with her as they want. Afterwards, she's to be sent to work at a local strip club/brothel but not allowed to dance or have any contact with the customers, effectively starving her.
* Hostile aliens from the Franchise/StargateVerse in ''Fanfic/{{XSGCOM}}''. Loyalist Jaffa are slaughtered in troves, and as for the Wraith... [[spoiler:within days of the expedition's arrival to Atlantis a full quarter of the Wraith hives in the galaxy are nuked.]] Not that the friendly aliens were any better, especially the Ancients.
* In ''[[https://www.fanfiction.net/s/10623866/1/Sekirei-Is-that-some-new-species-of-little-sister Sekirei? Is that some new species of little sister?]]'', Naruto makes it very clear he considers Higa to be this, outright calling him a moron for trying to "beat MBI at their own game and playing by their rules without knowing their capabilities." Minaka also qualifies for continuing to interfere with Naruto and Xanna well after they've made it clear they can kill him at any time and are only keeping him alive for their own amusement.
* [[Franchise/StargateVerse Apophis]] in ''[[https://www.fanfiction.net/s/10917821/19/The-questionable-burdens-of-leadership-of-a-troll-Emperor The (Questionable) Burdens of Leadership of a Troll Emperor]]'' fails to realize that seeing hundreds of Goa'uld killed has caused his slaves to realize they're not gods. It's even noted that Ra would have realized the danger of a human mob whose anger has overridden their fear. When Apophis tries cow them as usual, he's knocked to the ground and kicked to death.
** Later Manga/{{Naruto}}, [[Anime/{{Sekirei}} Karasuba]], and Setsuna are both amused and disgusted that the Tollan disable theirs and [=SG1's=] ranged weapons but don't even ask them to relinquish their swords (or Setsuna's many knives) even after Karasuba introduces herself with "I kill people." Naruto privately wonders if they've had so little conflict that they simply have no survival instinct anymore.
** The NID deserve a mention for both kidnapping Yahan, whom they know Naruto views as a little sister, then later trying to assassinate Naruto during a press conference. The latter is particularly bad since even if they succeeded in killing him, they know for a fact he has a warship in orbit and an empire spanning a considerable portion of the galaxy. Said warship is outright stated to be perfectly capable of [[EarthShatteringKaboom turning Earth into an asteroid field at any time.]]
* In ''[[https://www.fanfiction.net/s/11181910/24/Yet-Again-Still-Even-More-Fragments Iron Age Politics]]'', [[Series/BuffyTheVampireSlayer Quentin Travers]] is basically dead-set on alienating every potential ally he can, as shown when he plans to steal Xander's design for a stake railgun he created with [[ComicBook/IronMan Tony Stark's]] memories. He's also condescending enough to his assistant (who has several degrees under her belt) that she's started giving him extra sweets so it'll be less obvious when she poisons him into having a heart attack.
* ''Day of the Broken Fang'', a prequel to ''Fanfic/TheElementsOfHarmonyAndTheSaviorOfWorlds'', shows that this is what brought about the end of [[Franchise/GIJoe COBRA]] -- Cobra Commander, being based on his more competent Creator/MarvelComics incarnation, was smart enough to leave the [[Franchise/{{Transformers}} Decepticons]] alone. Serpentor, on the other hand, wasn't as bright; driven by an egotistical desire to prove his dominance, the SuperSoldier ordered an attack on the Decepticons' main base with a slew of untested weapons, just because Doctor Mindbender assured him that they'd work. Needless to say, the Decepticons were not only not harmed by the attack, but Megatron was so pissed that he ordered a counter-attack that [[CurbStompBattle wiped COBRA off the map]] (literally, in the case of Cobra Island), with only a handful of survivors escaping the massacre (including the Commander, who had [[OhCrap realized what was coming]] and [[ScrewThisImOuttaHere fled in time]]).
** One of the survivors, Overkill, clearly didn't learn anything from the experience. A few years later, he tried to rebuild COBRA from other surviving soldiers and resources, and tried to make their mark by attacking West Point. This, despite the fact that by this point, the Earth Defense Command (formed by the unification of the Joes, the Oktober Guard, and other special forces) had already driven the Decepticons off Earth. The new COBRA ended up crushed completely, with their stupidity lampshaded by the [[KarmaHoudini now-retired Cobra Commander]].
-->"I mean seriously, fifty people, some tanks and some [=BATs=]? Did his hard drive crash or something?"
* ''FanFic/TheTotallyAmazingSpiderMan'': ''Barely'' defied. [[spoiler: [[AlphaBitch Mandy]] ]] stayed inside of a burning building [[DeathByMaterialism just to save a prize-winning picture]], and when Spider-Man arrives to save her bacon, she ''very'' reluctantly leaves the picture behind, and only after being cajoled by the masked hero.
* In ''FanFic/OzInIkebukuroLand'', a crossover between ''Manga/PandoraHearts'' and ''LightNovel/{{Durarara}}'', the universally despised "father" of [[TomatoInTheMirror Oz Vessalius]] shows up when Oz is feeling most confident, (having used his chain to follow Jack there and prevent him from destroying this world too) and decides now is the best time possible to, in front of a large amount of people, start berating Oz and calling him a thing. [[BewareTheNiceOnes Mikado Ryuugamine starts telling him off for it]] and Kida Masaomi gets a little unnerved, but this moment really applies when he starts talking to Shizuo, telling him to stop hanging out with such a filthy beast.
** You know, [[HairTriggerTemper that]] [[NamesToRunAwayFromReallyFast Shizuo]] Heiwajima, who does not like it when people hurt children (or in this case, [[spoiler: a chain in a human's body]], and this same man dislikes those who hurt children most. So it's all right if he pressures this obviously pissed off guy to avoid a kid he's started caring for-to leave him. Of course, Zai gets kicked into the wall by Shizuo, who decides that he hates this guy more than Izaya himself and berates him, saying no decent person should treat their kid that way.
* Danzo really should have thought more about his decision to abduct not-quite-four-years-old Kobayashi Hikaru and deliver him to Orochimaru in ''[[https://www.fanfiction.net/s/11557398/7/The-Road-to-Ruin The Road to Ruin]]''. Even if Hiruzen didn't decide to stop him pulling the bullshit, he failed to consider two things. First of all, letting the kid who helped to save the Hyuuga Clan Heiress from a kidnapping vanish into the unknown isn't going to fly. Two, the kid's parentage by his mixed-blood mother means he's a member of the Uchiha and Yamanaka Clans, and both are already irked by the fact Hikaru wasn't identified sooner. And even if ''they'' refused to help, ''Hatake Kakashi'' wouldn't quietly stand by and let his newfound son be taken away from him.
* A group of Afghan fighters in ''[[http://www.tthfanfic.org/Story-31640-7/TattleTail%2bMy%2bCopy.htm My Copy]]'' decide it would be a good idea to [[ShootingSuperman shoot at]] Lilith aka Destroyer aka a female clone of TheJuggernaut. To make things worse, she's currently fighting a group of demons who had been previously killing them, but they decide to stop shooting the demons trying to kill them and start shooting the woman saving them.
* Lampshaded by Mace Windu in ''[[https://www.fanfiction.net/s/11577216/14/A-Horse-For-the-Force A Horse for the Force]]'' after Ranma wipes out a chapter of the Bounty Hunter Guild for almost killing Shaak-Ti. Mace remarks that any chapter that takes up the bounty on Ranma after both that and his actions on Yavin 4 will have "reached an evolutionary dead end".
* A pair of Slayers in ''[[https://www.tthfanfic.org/Story-28227-8/DianeCastle+The+Reality-Theory+Convergence.htm The Reality Theory Convergence]]'' decided to make a game of throwing knives as close as possible to the inscription of the ward protecting their apartment without hitting it. After ruining the ward, they don't tell anyone so it's not repaired until after they're attacked. Xander is furious and orders them to have to live with the rest of the "baby Slayers" and they have to share the smallest room because they're clearly not responsible enough to live on their own.
-->'''Xander:''' You two did something so stupid Iím surprised you can walk and wield a sword at the same time! You know how important these wards are, and you screwed around with them, and then you didnít tell anyone you had ruined them! You could have died! You could have gotten someone else killed! You got to stay on your own by promising to be responsible. Well, this is the exact opposite of responsible! Weíll have a van here within an hour. Have everything you own packed and ready to go. Clothes in suitcases and duffelbags, books and knickknacks in boxes, weapons in your gymbags. Weíll move the furniture and kitchen stuff later.
* Skidmark in ''Fanfic/{{Constellations}}'' sends a party of grunts kidnap a new cape who didn't use a SecretIdentity. No, the cape wasn't the dumb one, since the ABB - a gang led by a frigging ''dragon-man'' - likes her so much they would probably go to war to rescue her. Second: the cape is a ''priestess'' to a major goddess who can and ''does'' dish a BoltOfDivineRetribution for something so simple as slapping her human. And last but not least, the cape's father is a licensed Protectorate hero who's hellishly protective of her after his wife's death. Not only the attempt failed, Skidmark's gang was utterly gutted in the following days.

[[AC: ''Manga/DeathNote'']]
* In one ''Manga/DeathNote'' [[http://kikirini.deviantart.com/art/Kira-Hates-Sues-58694863 fan comic]], a ParodySue girl goes up to Light, knowing full well that he's Kira, and lists all her qualifications to be his girlfriend, including being [[InformedAbility smarter than anyone else at Wammy's House]]. She then gives him her name for him to write down, and he does... ''in the Death Note''.
* In ''[[FanFic/FortySeconds 4 0 s e c o n d s]]'' Tsen, a two-bit crook, goes around telling people he's Kira. Naturally the real Kira takes issue with this.

[[AC: ''Manga/DragonBall'']]
* This is pretty much the premise of ''[[https://www.fanfiction.net/s/3213992/1/Bad-Man Bad Man]]'': one of Bulma's assistants, being heavily in debt with the mob, decided the best way to escape them was to kidnap Bulma while she was pregnant with Bra and blackmail Vegeta into killing his creditors, [[spoiler:using a machine that hid ki signatures to not be located]]. Needless to say, when Vegeta ultimately ''did'' find him, [[MakeAnExampleOfThem he used the picture of his corpse on the papers to show the world what would happen to those who messed with his family]].
** Worse still, during her captivity [[DefiantCaptive Bulma had managed to leave the basement she had been trapped into]] and outright told her kidnapper to just surrender and hope she could convince Vegeta to show mercy. [[spoiler:He shot her and run]].

[[AC: ''VideoGame/FireEmblemAwakening'']]
* In the lost ''Future of Despair'' comic, Panne fits in through and through. Because "having to give birth to your and Henry's child in isolation per (fanon) Taguel costumes" should '''not''' equal to "stupidly running away from a mostly safe CASTLE to the nearby WOODS all alone and thus getting yourself [[HumanPincushion skewered with arrows]] by a bunch of dumb hunters who didn't know better". WhatAnIdiot!
** It's even worse when you recall the also lost notes on said "fanon" costumes. These instincts that lead Taguel moms to seek for "complete isolation" when giving birth are supposed to be ''completely irresistible and unrestrainable'', so [[UnfortunateImplications they imply that]] ''every'' Taguel mother is pretty much WIRED to be TooDumbToLive - not only they could potentially run into hunters like in Panne's case, but they deny themselves any support in case of pre/current/post-birth complications for herself and her baby/babies. ''Double'' WhatAnIdiot!

[[AC: ''Series/{{Glee}}'']]
* Blaine's naivety in ''Fanfic/HuntingTheUnicorn'' seems to have crossed into this. Not only [[WideEyedIdealist would he help anyone at all without even questioning]], but he's so ObliviousToLove that he completely fails to notice his StalkerWithACrush. PlayedForDrama in that he's not literally ''stupid'', but [[WideEyedIdealist sheltered]] and [[BrokenAce emotionally damaged]]. Also, he's aware of this and [[HeroicSelfDeprecation has accordingly low self-esteem.]]

[[AC: ''Literature/HarryPotter'']]
* Flint in ''[[https://www.fanfiction.net/s/8704528/19/Enveloped-in-the-Darkness Enveloped in the Darkness]]'' nearly kills [[MoralityPet Draco]], because he's Harry's best friend and Harry pissed him off. Not only does he brag about it in front of the entire Slytherin house and Narcissa, he then insults her when she gives Harry the right to enact the Malfoy family's vengeance. It apparently never occurs to him that even if Harry wasn't able to [[CurbStompBattle easily defeat him]], he's attempted to kill the sole heir of one extremely rich and powerful family who pretty much control the Minister of Magic. Due to the rules of the Dueling Pit, Harry doesn't kill him; [[FateWorseThanDeath he just makes Flint wish he had]].
* In one Harry Potter story, Hermione spots what she thinks is a WillOWisp. While following it, she notes how they're spirits that lead people into traps for fun. While not a will o' wisp, the flames are still controlled by Pansy Parkinson who quickly disarms and paralyzes Hermione.
* In ''[[https://www.fanfiction.net/s/11669575/20/For-Love-of-Magic For Love of Magic]]'' a trio of Death Eaters try to kill Harry during the second task, but not only do they keep on their voluminous robes underwater, they cast blasting spells. The resulting underwater explosion leaves them badly injured and unconscious. Harry simply leaves them to drown.
* Twice in ''Fanfic/DodgingPrisonAndStealingWitches'' John Potter pulls off an incredibly stupid stunt that nearly kills him (and others the second time).
** First, after the troll on Halloween is crippled and barely dragging itself along the ground, he leaps at it and casts a blasting spell at point blank range. Not only was it completely unnecessary but he's badly injured as a result. The girls who crippled the troll consider it the stupidest thing they ever saw.
** Second, upon coming across a necromantic ritual site, John starts casting in an attempt to destroy it. Doing so revives the Whomping Willow inferius there which nearly kills him, Neville, Draco, and Theodore Nott. Afterwards Draco tells him that introducing new magic to a ritual is literally the last thing you should do.
** Daphne insists Hermione come with her to heal a dying unicorn despite them both knowing it's being hunted by Voldemort and using a Sense Danger spell that tells them they're currently in mortal peril. After they (barely) escape, Harry lectures them for risking their lives over a unicorn. Unlike the troll on Halloween, where they faced a dangerous but manageable threat to save a classmate, here they faced the most dangerous dark wizard alive to save an animal.
* Hermoine's [[DomesticAbuser abusive boyfriend]] in ''[[http://www.fictionalley.org/authors/fenriswolf/RAR01a.html Revelations and Results]]'' decides that he can isolate Hermoine from her friends and beat her, all the while being aware that one of her friends happens to be [[BullyingADragon Harry Potter]] who, among other things, is nicknamed The Boy Who Lived because, among other things, he survived an attack from Voldemort ''as an infant'' and who is also considered one of the best wizards at Hogwarts. Needless to say, when Harry finds out, it doesn't end well for said boyfriend. Harry even says it at one point while delivering a NoHoldsBarredBeatdown to him:
--> "You know, Petersen, for a Ravenclaw, you're about the stupidest thing walking on two legs."
--> "I don't know what you're talking about," the Ravenclaw blustered.
--> "No? Well, let's see if I can jog your memory. Hermione Granger, your girlfriend, the one you've been using as a punching bag? The girl who happens to be my best friend? Who is thought of as a sister by every other boy in Gryffindor? Who also happens to be friends with most of the teachers at Hogwarts, including Professor Dumbledore? Do you have any idea just how many people are going to be after your head on a pike?" Harry shook his head and stalked towards his target. "You couldn't have picked someone more likely to get you killed if you tried, you git--not that it matters." He smiled; it wasn't a very nice smile, and Petersen swallowed.
--> "You see, Mark--you don't mind if I call you Mark, do you--we're going to come to an understanding right now." His fist slammed into Petersen's gut, doubling him over. "You're not Hermione's boyfriend anymore," he continued, chopping a short punch to his face, splitting his cheek. "You're never going to go near her again," he added, throwing two more jabs, one to the mouth, the other to the nose. "In fact, you're never going to look at her again, because you're dropping out of Hogwarts," he said, hammering another blow to the kidneys. "You're going to be gone within 24 hours, I don't care if you have to walk; because if you aren't, Mark, this will seem like a pillow fight compared to what I'll do to you." The last punch landed well below the belt and left Petersen retching on the floor.

[[AC: ''WesternAnimation/JackieChanAdventures'']]
* ''[[Fanfic/TheUltimateEvil The Stronger Evil]]'': After [[spoiler:Daolon Wong]] [[DePower loses his magical powers]], he intends to have revenge on [[DragonsAreDemonic Shendu]] for double-crossing him. He does this by using a stolen gun to shoot the Demon Sorcerer's [[VillainousCrush beloved]] Valerie Payne -- right in front of the full-powered demon while standing in plain view atop a van. Instead of trying to use the resulting shock from everyone's part to make an escape attempt, he [[BullyingADragon gloats in Shendu's face]]. [[spoiler:Immediately Shendu pummels Wong in UnstoppableRage.]]

[[AC: ''WesternAnimation/MyLittlePonyFriendshipIsMagic'']]
* ''FanFic/ABriefHistoryOfEquestria'': Roughly half of the Unicorn nobility stayed behind when the Manehattan river valley was evacuated for the new homeland because they couldn't stand the thought of abandoning their hoards of treasure. They were all naturally frozen to death by the Windigos.
** [[GeneralFailure Star Saber]]'s little group of thirty who tried to counter-revolt against Hurricane failed because they tried to steal weapons from an empty armory... which was positioned next to an active mess hall... in the middle of the day. Hurricane found this hilarious.
** The extremely misandrist stallion-hating Commander Sullamander tried to use her position to pass laws that would effectively ''outlaw heterosexual intercourse'' among the pegasi. Wind Whistler points out that this would effectively end their people, and as such attempting to go through with this plan would count as high treason according to the Articles of Command, resulting in Sullamander's immediate removal from office and execution. She very, ''very'' reluctantly backs down, much to Wind Whistler's disappointment.
* Krysta from ''Fanfic/MyBravePonyStarfleetMagic'', who decides to follow a strange orb of light with the voice of the bad guy, promising her to tell her where she comes from.
* Nightmare Sky, a minor antagonist in ''Nightmares'', steals the Elements of Harmony and tries to unleash their power on the Mane 6. To repeat, a ''Nightmare'', an incarnation of rage, hatred and disharmony, tries to wield a set of weapons designed ''specifically'' to fight disharmony, against the highly harmonious group ''chosen'' by said weapons to bear them. Given that Sky, unlike Nightmare Moon, did not have the advantage of having been an immortal god-pony before her transformation, the resultant backfire turned her into a sooty smear.

[[AC: ''Film/TheMatrix'']]

* Neo in [[https://www.fanfiction.net/s/6706547/1/Pointless-Agent-Insanity Pointless Agent Insanity]] takes this UpToEleven, with literally every single thing he does or says.

[[AC: ''{{Manga/Naruto}}'']]
* When the Kurama clan seeks to defect to Iwa in ''[[https://www.fanfiction.net/s/3665921/45/Black-Flames-Dance-In-The-Wind-Rise-of-Naruto Black Flames Dance in the Wind: Rise of Naruto]]'', one of the chuunin tasked with killing Yakumo's guards figures the medic is [[NoOneCouldSurviveThat dead for sure]] because he suffered a wound that would bleed out in several minutes. The other clan members are honestly amazed at his stupidity for believing a medic wouldn't be able to heal a wound like that when left alone and list off several different ways to do exactly that.
** The entire Kurama clan is this due to the clan head's policy of RevengeBeforeReason. They want to defect to Iwa but know the only way it will work is if they have as much of a lead over any hunter-nin as possible. Rather than quietly leave during the one time almost half of all forces are away from the village, he insists they first kill Yakumo who is under 24-hour guard. A guard manages to escape and Naruto's team (plus Anko) are sent in to capture and/or kill everyone.
* Tenten in ''[[https://www.fanfiction.net/s/5537220/16/The-Darkest-Light The Darkest Light]]'' insults Naruto/Naruichi and [[TheDon Takada]] within earshot of both. Naruto beats her unconscious (which is the only reason Takada's bodyguard doesn't kill her) then when she wakes up, she's ripped a new one by her clan head before Naruto fights her sword with a wooden stick, spending an hour beating Tenten then healing her back up so he can start over.
* In one ''{{Manga/Naruto}}'' fanfic, the Kyuubi released a powerful pheromone when it was sealed that basically made everyone into sex maniacs the moment they hit puberty (extreme horniness is a perfectly acceptable reason to be excused from class and it's considered extremely rude to reject someone if they want to have sex). When he first uses his [[GenderBender Sexy no Jutsu]], he's flat out told that turning into a naked woman, especially in public, will get him raped. When he says he'd just change back and laugh, he's warned that his attackers probably won't care what gender he is at that point. Naruto promptly vows to never use it again, [[WhatAnIdiot unless it's really funny]].
* Darui (and his entire team) in ''[[https://www.fanfiction.net/s/10518212/2/The-Pride The Pride]]'' threatens to kill Shizune (knowing full well she's carrying Naruto's child) if Naruto doesn't do what he says. Naruto is currently in [[SuperMode Kyuubi]] [[UpToEleven Sage Mode]] and fully capable of [[OneManArmy taking on an entire country by himself]]. Needless to say, it doesn't go well for them.
** A couple chapters (and several months) later, several Daimyo guards chase said Daimyo's prey ([[HuntingTheMostDangerousGame his]] [[MoralEventHorizon wife]]) through the tall grass of a preserve called The Savanna. Even if Naruto wasn't actively hunting them, experienced hunters like them should know better than to enter tall grass which has zero visibility on anything less than three or four feet tall. Especially since many of the animals from the Forest Of Death (such as giant tigers) are ''imported'' from The Savanna.

* ''Fanfic/AdviceAndTrust'': Gendo actually [[spoiler:''fires his two best Pilots'' for going against orders and pulling off a total victory anyway, thinking the new Dummy Plug system will suffice despite never being combat-tested.]] Even better, the timing of this means that [[spoiler:''Zeruel, the Angel of Might'']] shows up soon afterwards. Meaning, Gendo's suicidal overconfidence kicked in at the worst possible time.
* ''Manga/{{Evangelion 303}}'': Discussed. After Shinji pulled a suicidal move to win his and Asuka's dog fight Ritsuko reminded him how stupid was performing a maneuver that could have killed him, Asuka and their co-pilots during a training/friendly duel.
* ''Fanfic/NeonGenesisEvangelionGenocide'': After [[spoiler:SEELE's failed final attack, members of the SEELE council points out to Keel that Fuyutsuki is alive and now in the custody of the Japanese Government, warning him that Fuyutsuki knows their secrets, has plenty of evidence to back his claims, and no longer has any reason to protect SEELE]]. Keel's answer is alongside the lines of: "So what? Do not get worried. Everyone see whatever they want to see, and for no particular reason I'm sure that the authorities will see whatever version benefits us."
* ''Fanfic/TheSecondTry'': [[BigBad Gendo]] thought that torturing a short-tempered combat-trained teenager and [[spoiler:MamaBear]] with [[spoiler:the name of her missing child]] was a good idea. It was not a good idea.

[[AC: ''Manga/OnePiece'']]
* ''FanFic/ThisBites'':
** Cross's thoughts on why one of the Baroque Works moles in the Royal Army tattooed the company's emblem on his shoulder. The defeated soldier says it was a combination of a lot of alcohol, a lot of boredom, and the fact that nobody is supposed to know about Baroque Works in the first place.
** Spandam. [[spoiler:The man kept a ''black book'' for [=CP9's=] operations just to stroke his own ego. The fact that he hid it in a safe doesn't detract from this -- the book shouldn't even ''exist'', seeing as [=CP9=] is a covert black ops unit whose own existence isn't even officially recognized as far the World Government is concerned. All reports should have been summarily destroyed once confirmed. Once Cross finds it, it becomes the whistleblowing equivalent of a Golden Transponder Snail.]]

[[AC: ''Literature/{{Redwall}}'']]
* Arnold of ''Fanfic/SoullessShell'' falls for Leif's not very clever bluff when threatened with execution for rape, inadvertently confessing to his crimes while begging for mercy as Leif sentences him to death. It's suggested that had he not done that, Leif might not have had enough evidence to actually sentence him to death. He then breaks out of prison, and not only is dumb enough to want to kill [[GodModeSue Leif]] in revenge, but tries to rape a young girl first, pushing Leif's BerserkButton and earning him a messy death at the hands of his OneWingedAngel form. Apparently, he didn't even think to bring the guards he recruited with him, although given how easily Leif dispatches them soon afterward, they wouldn't have done much good.

[[AC: ''Literature/SherlockHolmes'']]
* Smith in the fic [[Fanfic/DeliverUsFromEvilSeries Mortality]] ''was an idiot'' for torturing a detective with an inch of his life and gloating over the guy while he's dying. [[BewareTheNiceOnes Watson doesn't take to well to this.]] [[BigBrotherInstinct Really, really doesn't take too well it.]] It ends badly for the guy. Most likely Smith gets killed [[DeadlyDoctor with Watson's medical skills.]]
** The captured criminal too. He [[VillainsWantMercy begs]] for mercy in having playing a part in what happened to Holmes. He gets [[TranquilFury coldly murdered]] by [[BewareTheNiceOnes Watson.]] BewareTheNiceOnes, indeed. Seriously. Watson ''might'' be [[NiceGuy very sweet]] but mess with his friend, though-he'll kill you. [[GoodIsNotSoft In cold blood.]] Basically, [[NightmareFuel he'll murder you]] if you ''really'' get him mad by messing with his friend.

[[AC: ''Literature/ASongOfIceAndFire'']]
* In ''FanFic/RobbReturns'', one of Asha Greyjoy's men thought he was better with a knife than the others and that he could lecture them on taking orders from a woman. As explained by Asha's second, he died of stupidity.

[[AC: ''Franchise/StarWars'']]
* In ''[[https://www.fanfiction.net/s/6873613/1/Food-Scandal Food Scandal]]'' someone decided to make money by tampering with the food they're selling to the military of the [[TheEmpire Galactic Empire]]. Worse, when troops from the ''Executor'' (as some of the tampered food had ended on Vader's ship) show up and he's identified, the culprit ''tries to kill the [=SciCorps=] officer that has just exposed him, '''in full view of a group of Stormtroopers that knows they would have eaten the tampered food had it not been discovered''''' (the only reason he survives is that the officer, who is there on Veers and Vader's authority, survives and tells the troopers that she needs him alive, and the Stormtroopers had their blasters set on stun at first).
** When the tampering is first discovered by the [=SciCorps=] officer above both her shift leader and the chief of provisions blow her off because [[InterServiceRivalry it's food for the Stormtroopers]]. They're on the same ship of Darth Vader, who, upon finding out, kills them (one is bashed in the armoured wall plating hard enough to ''dent it'').
** When she realizes what's going to happen, the officer tries to cover for her superior. Darth Vader can read minds, but lets her go with a warning of not lying to him due being the one who discovered the tampered food and was trying to do something about it to begin with.
** Many [=SciCorps=] officers ostracized the one who found out the tampering and got two of her superiors killed by Vader, fully knowing she had Vader's full support. Worse, they continued even after Veers leaked to the Stormtroopers what had happened. Thankfully, Vader doesn't find out, so they get away with a beating from the Stormtroopers-who, in all their fury, aren't stupid enough to commit murder on the same ship as Darth Vader.
** Ozzel expressed the same contempt as the [=SciCorps=] officers over the Stormtroopers, and openly complains they wasted time to track down people that had tampered food for the Stormtroopers. It's implied that this is part of what contributed to Vader eventually offing him.

[[AC: ''VideoGame/TeamFortress2'']]
* ''{{Paternal}}'': A Spy (separate from the RED and BLU Spies) named Bane is on a mission to capture the BLU Scout on the Administrator's orders. His modus operandi is to corner Scout while he is alone. The past several times, he has only failed because someone else showed up to save Scout. So what does Scout do in Chapter 26? He goes out for a jog in the training room. Alone. At night. Without a weapon.

[[AC: ''VideoGame/{{Touhou}}'']]
* Later in the [[Fanfic/Gensokyo20XX Gensokyo 20XX Series]], this is played with an age-regressed Reimu. On the account that she cannot sense danger and seems to have an inability to fear, the other characters tend to see her as this, as she is known to place herself right into danger and engage in something reckless. This is further exacerbated in that if told not to and the reasons as to why, she would do it anyway, especially in situations in which she should probably know better or otherwise have some common sense (like "don't put things in your mouth to see what it is", for example). What ''really'' doesn't help this is that, by being mentally conditioned and the results thereof, she doesn't have anything in her mind that tells her not to or makes her question anything, her reasonings especially.
** This is PlayedForLaughs, in Baka's case, who is apparently stupid enough to fall for Reimu's tricks, the which involves him being tricked into sticking something in electric outlet. From what is said about that, he's fallen for it more than once and never seems to catch onto the fact that is why Reimu tricks him into doing that in the first place.
-->'''Ren''': "You are stupid as hell if you can fall for a child's mischief more than once."