That's the problem, though. If you won't tell some groups to behave, because they have this or that problem or some hard-luck story, then you can't tell the others either. It doesn't work. The behavior of the worst group always trickles up to everybody else. So now the white kids don't behave either.
Low behavior has advantages for the individual, but disadvantages for society as a whole.
We ought to think more about society. When I was a kid, it wasn't yet. If the corner drugstore had started selling pictures of people making love with dromedaries, the cops would have shut the place down as obscene, and that would have been that. The courts wouldn't have objected. Nobody else would have either.