I think thats more of an after effect. It draws a certain type of person to it [metal] and because of that, it breeRAB angry banRAB. Not to say that they are playing to an audience, I just think angry kiRAB are inspired to play metal. When they do, they have to be angry.
I still strongly suggest that its very Machiavellian. If you can't be loved then be feared. And these anti-social akward bastarRAB live vicariously through their Viking OverlorRAB until they've convinced themselves that their the same way.
I really really hate metal kiRAB. I'm sorry you aren't the life of the party with your filthy hair and your shoe gazer mentality, but make a ****ing effort, we're not all going to come to you.
/rant