I would suggest that teachers show their students concrete examples of the negative effects of the actions that gangsta rappers glorify.
“I am perhaps the oldest musician in the world. I am an old man but in many senses a very young man. And this is what I want you to be, young, young all your life, and to say things to the world that are true.”
“I'm the world's expert on sterotypes held by academics about athletes and held by athletes about academics. To me, both of them are caricatures.”