IC =/= OOC. Seriously.
I'm kind of amazed by the number of doofii who seriously think that RP'ed character traits mirror the character traits of the player.

Oh god, whine whine, Pup C is in a suspect and not wholly healthy relationship with Pup X, their players must be deviants - they even acknowledge that it's suspect! Scream! Panic! Flame! RELEASE THE HOUNDS.

By that 'logic', anyone who plays Beyond Birthday, Hannibal Lecter, the Joker or Vicious should be under SWAT surveillance in case of sudden ludicrous homicidal mania.

Why are people so dim? I'm not my PCs. I do not possess a keyblade and pipes like Billy Zane, a sword longer than I am tall and silver hair down to my ass, the ability to turn into bats and out-sass any given Belmont, or eeeeeerie poweeeerrrrssssss of any sort. This should be obvious.

(This falls into the same category as 'just because X is a fic kink I like does not mean I would do X in real life'; the BDSM kinks I read, for example, are a lot more hot-fudge-with-pralines than anything I'd actually do IRL.)

ETA: 'cos fakename pointed out an important thing that my brain didn't locate!

On the other hand, it is just as annoying when someone claims that they're just playing their characters if they've chosen arbitrarily to make them all jackasses, or it's extremely clear that they're cut-pasting a bunch of their trains, likes and dislikes onto a character and using them as a canon-sue or stand-in for themselves?