Any of them who participated in the song, knowing what the message would be are responsible for it.

I don't give a damn if they were in their 20s. They were old enough to have record deals and put their voices down for people around the world to hear. They're responsible for what they say.

If they regret the song, they should renounce it.

EDIT - some of the arguments y'all are making regarding this issue (here & in the Lesson) are really embarrassing. Has OKP really become that bad? We used to have some real provocative thinkers. The level of discourse in this place has become pathetic.