1) Furries who can speak English well but their typing of it on a forum is atrocious. Stop being lazy!
2) Social justice warriors (Mentioned previously)
3) Extreme lifestylers where it gets in the way of everyday life.
4) Furries who think they're entitled to free art.
5) Having thin skin, especially if they are an artist of any sort. Criticism is part of life, deal with it.
6) Forum users like or similar to OP, tho they are entertaining and mix things up here on FAF. ;V
7) Furries who must insist shoving fetishes in your face (Previously mentioned)
8) Baby/diaperfurs who insist on speaking like a young child on forums or a chat room, let alone worse if used at meets or cons, despite being a fellow DF who HATES this type of thing.
9) Furries who block over the most trivial of things (See #5)
10) Mindless asspatters/zombies of popular furry artists.