As a die hard rap fan as well, I would say the vast majority of artists fall into that stereotype.
I love rap, but even I have to admit that a lot of rap lyrics are dumb and offensive, and definitely play into the hands of those who talk about "rap culture" (I think Boondocks does a pretty good job of showing this by the way).
IMO the majority of artists that are positioning themselves as "rappers" are actually pop artists, coming straight from the assembly line of the big music publishers. (also truhead speaking here)
I love rap, but even I have to admit that a lot of rap lyrics are dumb and offensive, and definitely play into the hands of those who talk about "rap culture" (I think Boondocks does a pretty good job of showing this by the way).