Professors in the humanities in the United States make references to hip hop culture and probably even accept student papers that make a lot of hip hop references.

On one level, it might be ok if they were into hip hop, Nietzsche, Marx, and Freud, and I think in the past a lot of professors hoped that this is how it would work out, but in practice what happens is the professors are condoning and approving of hip hop and popular culture and college students never think of moving beyond it into something more substantial. In a way, hip hop can be confused with being substantial and deep because it is related to race relations, but it is also extremely shallow.