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[[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: ''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: ''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 Kyon: Big Damn Hero]]'', Haruhi thinks this of Taniguchi after learning about his ratings. Kyon calling him a 'living perv-wiki' probably didn't help.
* Dr. Emil Hamilton in ''[[http://www.fanfiction.net/s/9381514/1/Terminal-Justice 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/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 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.

[[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 and lists all her qualifications to be his girlfriend, including being [[InformedAbility smarter than anyone else at Wammy's House]]. She then asks him to write down her name, 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: ''VideoGame/FireEmblemAwakening'']]
* In the LostForever ''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 now also LostForever 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 will o' wisp. 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.

[[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/MyLittleUnicorn'', 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 ([[MostDangerousGame 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.

[[AC:''Anime/NeonGenesisEvangelion'']]
* ''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.

[[AC: ''Franchise/{{Pokemon}}'']]
* ''Fanfic/PlasmasFolly'': Even if the formula hadn't been faulty, common sense says it still wouldn't have been a very good idea for Colby to inject himself with a random syringe he found sitting in a paper bag.

[[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: ''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."