That's a good point, and when I taught in a different big city there were strict dress code rules, but the kids just kept finding ways around them, like wearing medical masks of all things, etc. They kept adapting the rules, and the kids would adapt around them, over and over. But most of the articles I've read never mention gangs, just that idea of a haircut or streak of color being a "distraction." Maybe the schools don't want to dwell on the gang problem publicly!