I agree as far as the newsposts, I don't think that anything bad can come of that except from idiots commenting on them, but that can be fun too.
I just am too pessimistic in this regard to believe that this site will ever foster a general yearning to branch out into other genres of music, both because of the name, general age/viewpoints of the average newsposter and the outlook of some of the staff
You can apply that to every genre. I bet if you looked at it percentage-wise, there's more negativity and stupidity in your standard *insert AP.net band* thread than a rap thread or review. Because people that don't fuck with rap, for the most part, don't even go into those threads. Of course there will be a few that stick out that are always beating the drum that rap sucks, but it's mostly rap fans in those threads.