Chosen to Destroy: In the author's own words it "sums up my opinion on the Buffy Finale: Chosen". The fic is basically an expression of the author's hatred and contempt for Buffy (and to a lesser extent Angel), having the First destroy the entire world, what should have been the best demon fighting team ever (Xander, Giles, Willow and Faith) fail to form, and the First Good itself try (and fail) to set Buffy up to die, all because of Buffy's stupidity and ego.
"...no pagers, no iPods, no iPhones, no iTunes, no PDA, no laptops, digital cameras, no video cameras, no mini-DVD's… In fact, no technology that essentially does the exact same thing, but Apple says are each incredibly different in a scheme to make money."
Tiberium Wars has a few of these, directed at the official Novelization of the game, including a choice jab at the novel's act of having a raw private dropping his loaded rifle and scoring a headshot at long range with a pistol - by having the same thing happen, except the man doing it is Havoc.
The Nod biker was a hundred meters away, with a dozen Nod soldiers between him and the man by Nigel's bike. A normal soldier, straight out of boot on his first day, would never have made that kind of shot with a pistol. Even an experienced target shooter might find it difficult.
Michie: No one wants to fucking see that. It's sexist, it's desperate, and the worst part is this shit always sells! It's sexist for BOTH genders! It's sexist for females because it shows how desperate they are just to get one guy and battle each other for him, despite the fact that there are more fish in the sea and at least learn to communicate with other possible males around, not just get one fucking guy! And it's sexist for males because the writers make it seem that if you're boring, generic and uninteresting; you're no doubt the perfect guy! That's a big "fuck you" for males who actually do have unique quantities, trying hard to even try to get a girl, no matter if they look ugly or pretty and have difficult lives!
L: There's the cultural stereotype of the Uke, who receives blow jobs from the Seme, which is seen as a privilege for the Uke. In return, the Seme gets to enter the Uke, which is a privilege for the Seme. However, it's considered degrading and low-status to be entered by another man, so supposedly nobody wants to be the Uke and the blow jobs are seen as a way to compensate the Uke for that humiliation and entice him into his role. I think you view yourself as the Seme and me as the Uke.
Light: But those are just stereotypes. No relationship is really that simple unless there's at least one idiot involved.
"Suddenly a rocket WOOOSHED past and left a big line of smoke and a bang at the end where it missed but only the helicopter because it still hit another tower but it was okay because noone was in the tower except for that leloosh guy (MORE LIKE LELOSER AM I RIGHT!) an d everyone hates him so its cool except he has a giant robot and also ive never seen it."
Give adolescents access to spellbooks and magic wands and things, and there's no tellin' what the little sods'll get up to. It'll all be School Houses with peculiar names, or just dam' silly ones, in competition with each other...
The Dark Lord's Equal gives us a fan theory for Albus Seversus's sucky name: Harry got drunk and began listing the names of all the people he hated in his life on his future son's birth certificate so the kid ended up being named "Albus Severus Tom Vernon Potter."
Chapter 9 of Deritine's (canon compliant to book 6) fanfic Warping Circumstances explains that the canon series is actually the result of Harry's failure to defeat Voldemort (in the universe of the fanfic). The "Powers That Be" were going to replay the major players in the propecy repeat it with "karmic debt". As the explanation of what would happen to who and why, it quickly becomes clear that the PTB, and by implication canon, are both horribly unfair and needlessly sadistic.
During one of the glimpses inside Jade's mind in Queen Of All Oni, the Aspect representing Love is stuffed in a barrel and thrown overboard, because "things are complicated enough; we don't need lovey-dopey stuff in the mix." Word Of God is that this is meant to be a statement against unnecessary Shipping making stories more complicated than they need to be.
In The Service is itself a subtle but fairly long Take That against the tendency of Lyrical Nanoha fanfiction to make the Time-Space Administrative Bureau even more Mildly Military than it actually is in canon, or to outright forget it exists in favor of AU or semi-AU NanoFate stories. It also delivers a few more direct ones.
The offshoot story A Numbered Existence spends several chapters on the Huckebein from Magical Record Lyrical Nanoha Force, culminating in Jail Scaligetti's Combat Cyborgs curbstomping most of them in "What We Were Born To Do" and Veyron's belated acknowledgement that a large multi-planetary government has a whole lot more resources and people to throw at the Huckebein they could ever have dealt with in "Flipside".
A lesser but related example is Tre's taking one look at Cypha's oversized swords during their first encounter and dismissing them for being too easy to step inside the arc of. Tre then immediately demonstrates this problem by getting in close and nearly taking one of Cypha's hands off.
The concept of Mindlink Mates comes into play during a discussion of inter-Wolkenritter relationships, where it's revealed that because that trope would ensue the Wolkenritter can't have physical relationships with each other: no longer being an individual is scary.
Rick and Cyrus are discussing the notion that Spider Man got his powers from a spider-totem, and immediately dismiss it as the stupidest thing they've ever heard. They then discuss the only things that could be even stupider, such as the idea of Spider-Man unmasking himself.
The villainess Lullaby, who's a bleach-blonde slut with an absolutely atrocious singing voice, is a thematic representation of Britney Spears, Lindsay Lohan and Paris Hilton. Her fellow villainess Spectra is a thematic representation of revolutionary whackjobs like Che Guevara.
Both Red and Alyssa's father Elliot go on separate rants about Alex Rodriguez, giving him nicknames such as A-Fraud and A-Choker-In-The-Playoffs while ridiculing Rodriguez's absurdly bloated $25-million a year salary.
While watching a soccer game on TV, Red and Cyrus laugh at the notion that what they deem "the most boring game on the planet" has provoked everything from riots to murders to political upheaval to wars. When Cyrus asks why they're watching it, Red snarks that sometimes he likes to remind himself why America seceded from the British in the first place.
The Powers Of Harmony takes a stab at a major plot point of The Immortal Game (Celestia manipulatively training Twilight to be the greatest warrior ever) when Luna asks Celestia is Twilight knows any offensive magic:
Celestia: If she does, she didn’t learn it from me. We covered a few theories on why certain spells have been declared forbidden, but it’s not like I was prepping her for war. The next thing I’m going to hear you say is that I was secretly turning her into a brilliant military strategist so that she’d rise up and become the ultimate weapon.
Discord: "Would you care for a cupcake? Never cared for them myself. Too bloody."
Really... there's a lot of huge Take Thats to Cupcakes, ranging from the gentle (The Light In The Darkness) to most of the things described above. The fandom hates it. It's a very hateable fic.
My Little Unicorn: Titan blowing up Equestria and the author turning the main cast into losers who can't do anything without the Unicornicopians' help may be one, taking the Revenge Fic nature of the story into account.
A more explicit example is given later on. In a flashback chapter, we see the Grand Ruler as a teenager being constantly bullied by a unicorn with the name Dusk Shine. Said character is based on someone who posted on fimchan and asked the author about various Plot Holes.
The entirety of Chapter 5 of Starfleet Magic 3 is a prolonged attack on all his critics.
In Escape from under the Hokage's hat the author takes multiple shots at Kakashi for (canon by the way) teaching Naruto and Sakura only ONE thing (tree climbing) yet focusing on teaching Sasuke more. Made worse when Naruto beats and returns Sasuke during the retrieval mission yet is in critical condition from THE CHIDORI! The other ninja (as in the other Jonin, Jiraiya and Tsunade) call him out pointing that Naruto and Sakura are weak due to him not training them but Sasuke. When asked why he didn't focus on being the teacher Naruto and Sakura needed he tries (and fails) to explain. He ends up calling Sakura weak (indirectly and boy do they hate him for it) and Jiraiya asks this gem (about Naruto) that shuts him up:
Jiraiya : "You didn't want to teach him anything that would've pissed off the Uchiha right?"
Which is a Massive research failure by the author as Kakashi only focused on Sasuke after he was marked by Orochimaru ( Tsunade and Jiraiya former team member which their failure to stop are now endangering Sasuke) and targeted by Gaara, then a bloodthirsty lunatic. Worse, Kakashi always enjoyed annoying Sasuke and the idea of him not teaching Naruto because he's afraid it'll anger Sasuke is downright hilarious. Not to mention that it was Jiraiya himself who told Kakashi to focus on Sasuke and to leave teaching Naruto to him. It's a common case with authors who are too eager to bash without actually paying attention to the event of the series to make this ridicules mistakes.
Impatient, I reached over and pulled down the quilt, revealing my stunning, immaculate, Adonis-like, statuesque, perfect husband. I wasn't quite sure when we had gotten married – probably about the same time I had gotten pregnant – but I was fairly certain we were married.
The fic New Champion Evangelion is one long truly Facepalm-inducingTake That against Shinji as a character, intended to show what would happen if a "MANLY NONPUSSY guy" took his place. A more specific example when Ramiel (which is never named) is described as "A HUGE BLOCKY THING IT SEEMD KIND OF LIKE A REFRENCE TO THAT SHITTY MOVIE FROM THA 60S THAT WAS REALLY FUCKING BORING I THINK IT WAS DIRECTDED BY THAT GUY CUBICROCK OR SOMETUING"
Netraptor's Door Stopper series of Sonic the Hedgehog fanfiction "The Netraptor Sonicverse", contains a few generally subtle ones, generally towards the Sonicfandom. Perhaps one of the more notable examples would be Amy's subplot in "In Pursuit of Revenge", where she attempts to play Operation Jealousy by attemting to go out with three different people, Tails,Shadow, and Metal Sonic. Tails goes on one awkward date, but really is more interested with machines than anything else. Shadow lets her stay with him for awhile, but is far more busy with his own subplot and quickly grows tired of her. Metal Sonic (who had long since performed a Heel Face Turn), turns her down on the spot, albiet in the least rude way of the three, as he is far more interested in his subplot and taking care of his chao.
Luminosity: Edward and rational!Bella discuss what to name their child. They want to root her to the family, since she's going to be so rare a species that she may only see someone else like her once. The obvious way to do so is to combine Bella and Edward's mothers' names, but they decide that any combination of Renée and Esme sounds like a Pokémon.