This is me, thinking critically about the media

During the past few days, we have been discussing minority involvement in dramas (or the lack thereof). Mr. Bolos and Mr. O'Connor said that there were basically two types of minority involvement in network dramas: no involvement at all or tokenism. To me, this is a problem.
But going beyond said dramas, where does someone like me, who goes to an extremely un-diverse school, form their opinion of minorities, mainly, African-Americans? There seems to be two options besides a homogeneous cast or tokenism on network dramas: All-Black sitcoms and MTV.
Reiterating what the teachers said, black sitcoms are rarely dramatic or serious, and the various casts are basically clowns; just there to entertain us, the 25-50 year old males.
The current MTV is a waaaay different story. This channel projects that all blacks are "gangstas", "thugs", or "pimps". The music videos, mainly rap and hip hop, make black men seem violent, sex-crazed, and basically illiterate, while the videos make black women hoes and objects. Bill Cosby, in one of his routines, compared rap music videos to minstrel shows. I whole-heartedly agree with him on this one. Even at school, I hear the influence of the videos through language that people use and the treatment others. I mean, when I start to overhear a white male my age say something like, "Yo, get off my grill, hoe" and another white male respond with, "Hey, stop acting so black," you know that something is a little fishy. I swear to god I hear similar conversations to this all the time! Since when can one "act black"? Are people really that one-sided?
These videos never project a positive image of an African-Americans, yet I'm not sure how to stop them besides expressing my opposition. Any suggestions?