I disagree. The rudeness and bad air is pretty easy to trace down to one poster, at least he is involved in every thread that turned sour, usually the first one who resorts to personal insults.This is not about personalities. I mean, theory threads always had a tendency to get nasty. The tendency transcends any particular member or members.
These kinds of huge forums always dig up people with mental and/or social issues. Sadly there's not much forums can do to help these people.