The forums do tend to bring out the worst in many, perhaps in some ways like alcohol can. I think it's a true test of character when one conducts themselves online as if they were being observed by their employer (present, future, or otherwise). While I've had my less than perfect moments on forums, I really do try my best to be positive, helpful, and friendly. Much as I strive to do in real life.

As far as one group being worse than another, I've not noticed a difference, particularly in real life. Even among supposedly "rival" pilot groups, most I've encountered in person at the airport, jumpseating, and so on have been professional and enjoyable to talk with. Just my $0.02...