Well, in fairness, like most animals, once they lose their sense of fear of punishment, they become dangerous. They young brain especially, is still pretty lizard like and the inner city youth, seem especially so, since there is little in the way of education or learning to help mature past that.
Unfortunately, what is required is to put the fear of God back into them all. You do that by establishing control in an utterly brutal way that is targeted but very severe. This is something the animal mindset can understand (and respects). We need the modern equivalent of crucifixions lining the Appian way. With social media, would require not nearly as many as the Romans processed for all to get a rapid education.