I'm in prison. But my heart and mind is free. Gangsta haters on the streets are doing more time than me. They need 30 police escorts with them every time they walk down the street.
I would suggest that teachers show their students concrete examples of the negative effects of the actions that gangsta rappers glorify.
A fact is a simple statement that everyone believes. It is innocent unless found guilty. A hypothesis is a novel suggestion that no one wants to believe. It is guilty until found effective.