My son is 10. I monitor all of his TV and music.
Now I do like Good Charlotte. Well, I should say I like the one song they have, The Anthem. I haven't heard the entire CD.
My son started having a pretty hard time at around 7. I do give in on some things, just because I feel like I need to pick my battles for when it really counts.
My son only hears music that I have already listened to. I make Cd's for him so he isn't coming to me with stuff he's already heard.
An example was Jak and Daxter. He really wanted the Jak II playstation game. I let my brother give it to him for Christmas. Oh man, the look on his face was priceless! I knew it was rated T, but I wanted him to feel like he fit, ykwim? Anyway, it started off ok, but the more he played, the more violent it got, so after about 2 weeks, I took it. He was disappointed, but that was about it.
My parents freaked about the music I listened to (ozzy, megadeath, priest, maiden etc) but it wasn't about raping people

: It was certainly angry but I do believe it is more than just teenagers needing their own identity.
I know for sure that at 16 years old he will listen to whatever he wants to listen to. And I absolutely will not try to control that. I would be crazy to do that (JMHO!). But for now, at 10, I'm going to protect him as long as I can. Just because society as a whole is growing kids up sooner doesn't mean they have the skills to deal with it....... I don't want my 10 year old listening to angry music.
Good for you mom! As long as you guys are talking about it and he knows you love him and have his best interests at heart, that's all you can do....
Good Luck
Lisa