At least 75% of the music that is currently popular with young people. If I have to hear one more shitty rap song or god-awful pop/emo shit blaring out of someone's car windows at 3 o'clock in the morning on a TUESDAY I am going to lean out of my apartment's windows and paintball their damn cars.
Even if I have to buy a paintball gun to do it.
To be specific, though, there's a few that stick out in my mind right now as deserving obliteration: The Killers' "Somebody Told Me", one Fallout Boy song I can never understand the words to that got played a lot on the radio a while back, and that "My Humps" song. Ugh.