I'm more concerned about the current state of vanity in mainstream pop music culture than I'm about rap.
If you notice, rap CAN be used as a social commentary, political tool. Just look at N.W.A's "Fuck The Police" or Ice Cube's "AmeriKKKa's Most Wanted."
Those were most likely politically motivated works, beyond the whole gang banging and hoes and "capping" people's asses with "pieces". They may not have been poets (though I'm sure they'd disagree) but they were employing an outlet to get their oppinions out in a time where their oppinions "mattered little". After a while the whole thing exploded and, well...
I should confess that I don't really seem to dig most rap, at all, and have actually listened and enjoyed very little. Most of it, To me, is mostly un-listenable, but that may stem stem from a cultural bias on my part. Also, I find the constant glorification of chauvminism, gang violence, "hustlin'" and overt-machismo put forth by lots of male rappers to be quite boring and off-putting, but to each their own.
What really bothers me is kids acting out and relishing the rap "background culture" without really having an ounce of idea about where it comes from, or better put, they lack the cultural background to even relate or understand on a social level what they are doing and endorsing, and that to me is dangerous, but that also, is not exclusively reserved to rap, only.
Quoting Angela Wright, "Peace out, Dogs..."