Hi Moffy, and welcome.
We speak nicely to most, but even when speaking crassly, it's all a big joke, and not meant to be taken seriously. We dish it out, and (most of us) can take it. There are exceptions to every rule, of course.
I, for one, hope you stick around long enough to see that we aren't all bad..we debate and discuss, try to educate (and get frustrated when you can't..you'll see what I mean by that when you meet caskur) and learn something along the way. Give it a shot, don't take anything too seriously, and enjoy your time here.