i personally feel that media just likes to pick on stuff that isn't "mainstream", like how hip hop isn't picked on because they help the media flow with all the big $ bucks...
i never listened to metal when i was younger cuz my mom didnt like the music and i respected her stand, then my friend introduced me to some Dream theater metal as well as other various metal stuff like sonata arc, strato, symphony x, etc... hey, some songs have more meaningful lyrics than POP songs and even PUNK -_-
take for example: nobody complains about Chemical Romance's video of them DANCING at a funeral, and i feel that's totally out of line - even if it's just an MTV. but the moment teens headbang to metallica, people snigger and say we're intoxicated.
well as for black metal, i stay away from any song with lyrics that are dodgy, no matter what religion you are, i guess u'll agree with me that u wudnt wanna be singing along to the Devil's music.