well - to be honest.. i think (from personal experiences) that most blackmetal-dudes are kids - they think its cool if someone sings (or grunts or whatever you call it) of peeps drinking blood, and satan and what not. i have seen very little blackmetal bands that are realy serious. alot are just a bunch of adolescent fellas in black clothes and white painted faces immitating their idols.
that might sound hard or like a prejudice, but i dont say such things just for fun - i know ALOT of black/deathmetal musicians and fans - and what i just said fits for 95% of those peeps. and when i look at those wannabee-lyrics that have been posted here, it just underlines my statement.