emo does suck for the most part, but if I've learned one thing about living with roomates, is that it's give and take. For everything that he does that you hate, I'm sure there is something that you do that he hates. Choose your battles wisely, revenge can only perpetuate animosity. I suggest buying him some headphones, or at least suggesting that he use them when you are arround. You should lead by example as well, don't expect him to give up his music (no matter how crappy it may be) if you would not be willing to do the same were your situations reversed.