It kind of got buried in the other threads, but I want to make clear that I'm not going out of my way to offend people. I don't just run off a long string of curse words, or make an effort to piss people off for my amusement or anything.
It's much more passive than that.
At the end of a long day though, I'm not going to go out of my way to make damn sure everything that comes out of my mouth is rainbows and sunshine either.
I just act online the same way I do when I'm with a group of friends, and we're all completely comfortable with each other, and have the freedom to use language or talk about subjects in a manner we might otherwise not unless in private, or shrouded in the noise of a bar.
And I know that there are players out there that wouldn't appreciate it. So I either enter a party with friends or, if we don't have enough for a full team and actually want to communicate with the other players enough for basic teamplay, then we leave a lobby if we feel like there are those in the room who might be offended by our casual, unguarded conversations, reactions, etc.