I'm in the camp that doesn't see a need for the rules, but I have no problem with moderating the language if that's what the GM for a particular game would prefer. I look at you guys and gals as my game group and so it doesn't bother me at all if anyone pops off with some f-bombs.
The attacks, yeah, there's a few times that it's gone overboard, but I think that generally we're pretty good at policing ourselves and calling someone out if they go too far -- but I think it's a real fine line since as we all know, sometimes you ARE lying and I want to be able to call you a liar when that happens.
Except me. I never lie.