Sometimes spelling a character's name 'wrong' isn't so bad - some characters have very unusual names, or there's more than one way to spell it. Or you made a slipup. But that's no real excuse for the bad examples.

Crap summaries involving any of these phrases:

"I suck at summaries"
"It's better than it sounds"
"No summary"
"???"
And speeling mistaks in yur sumarry.

Everybody makes mistakes from time to time - most of the time your spell-check will pick it up (except when it comes to things like the Snark Bat). For Godssakes turn on your spellcheck!

All things point great heaving arrows to the big sign saying, "If you can't write a decent summary, what the hell are you so keen to write fanfic for?!"

Writing a pairing fic and then making your readers "choose" the characters. I don't mean surprise pairings, I mean the author purposely writing the characters in such a bland and ambiguous way that you could literally insert anyone from canon (or themselves, maybe) into the prose and it would fit. I get that it potentially appeals to more readers, ie squealing fanbrats, but come on. It's just taking laziness to new levels.

In short...fanfiction: You are doing it wrong.

If you are going to write a fanfic about a specific couple on a show, please keep them in character. When you have Rory anally raping Amy till she vomits, and The Doctor calling her a little slut, I'm assuming that you don't like the fact the female character is independent and want to take her down a peg and insist on the two main male characters (her husband, who waited 2000 years for her to come back, and The Doctor) to agree with you.

The same story could have been written as original erotica with three generic characters, and while it would still come across as misogynist, creepy and disgusting, at least you wouldn't be raping actual actors both figuratively AND literally.

Songfics. Yes, the whole goddamn genre is a badfic sin, because I have never once seen a songfic that didn't make me consider swearing off fandom for good.

I can understand being inspired by a song, but why is it necessary to transcribe all of the lyrics? Like, am I supposed to be singing along or something? Especially for one as repetitive as the Numa Numa song? Can't you just say "the characters sing the Numa Numa song" and leave it at that?

Really, why copy and paste Mai-ia-hii Mai-ia-haa over and over and over and over and over again? When the song is twice as long as your shitty fic? Why?!?!

Oh, not all 'songfics' are bad.

Trouble is that the good ones are more fic than song.

What gets me is when people try to turn a musical into another fandom. Like when somebody tried to pull off 'A Christmas Carol' in Sonic but all they did was transcribe "A Muppet Christmas Carol". Complete with songs. And when I pointed out they were ripping off what was the best, most accurate adaptation of A Christmas Carol there exists, they had the gall to say they hadn't noticed.

Also when people try to totally rip off less well known books with the exact EVERYTHING. I caught somebody trying to do that to a Point Horror book and told them they'd been caught.

It's all very well to put a 'twist' on a premise but for god's sake at least TRY to put your own spin on it.

There's quite the number of Alice In Wonderland crossovers out there. But at least people don't have the cheek to transcribe it.