I have a slightly different view about eminem and his lyrics, as follows:
1) Eminem wants to make a lot of $$$$$.
2) To do that, he has to sell a lot of CD's.
3) To do that, he must have mucho publicity.
4) To get that, the easiest way is to be really controversial.
5) "Hey! Lets slag off gays and women. That'll get everyone talking!"
6) Eminem promptly makes lots of $$$$.
He probably doesn't even know what "societal ills" means ("maybe it's, like, when you puke after too much booze and ecstacy").