I hear ya. I try to be polite. Sometimes I think I get out of line as well (hope not). But I try to treat people here like I was talking to them face to face. :-)
Thats really the best policy, and perhaps one that we should all remember...I think being that we are not face to face, but more or less anonymous at our keyboards, some folk tend to forget that there are real live people at the other end, and real live people watching everything we post...
But if we consider what we say on FR, and then imagine if we would or could possibly say that face to face with someone, we might actually change what we say, the way we say it, and with what tone we say it...