I'm just a n00b here, but I am a member of several forums, and I would have to say that with the huge the number of members this forum has, the majority of people have been very helpful.
I think some are just not able to draw the line at the Community forum, and probably do not realize they are offending some of the members. I do not think that when this happens, a PM to the individual would be inappropiate. At least, then they would learn be more aware.