I don't see where the hostility comes from. I don't roleplay actively... but who's to know? I just keep a fun and forward attitude towards the game, and I tend to type a lot, even in the middle of fights. Wether my jokes and stupidities are mine or my character's is nobody's business.
In any case, I treat RP's with respect... or with the same lack of it levellers get. Makes the game much more fun, imo. I'll use game jargon most of the time, if it reduces the typing, but I tend not to talk about game mechanics, aside from levelling and/or dying.
I don't think RPing or not is a binary choice. There are plenty of levels in between, and one dynamically adjusts to what the other players are doing at the moment. I'm more focused when playing with strangers, but when playing with my supergroup I'm a bad stand-up comedian in full body armor, and I have a blast with it.
