That's a biased sample. Children are more likely to lie/cheat/steal when they're from shitty circumstances; if you grow up knowing that adults will not help you

That's a biased sample. Children are more likely to lie/cheat/steal when they're from shitty circumstances; if you grow up knowing that adults will not help you when you need help (for instance, asking for food doesn't work, or that telling the truth will result in punishment), then once they're old enough to take care of their own needs/protect themselves, they do. They just have shit judgement because they're kids. Basically, it's what happens if you teach kids that the system/adults/authority only exist to punish and hurt them. (I'd also bet those kids have a decent amount of empathy for EACH OTHER. Just not you.) Any school is going to have a population of those kids, and those kids are indeed a problem for nearby businesses, but that 10-20% can't be generalized to biological developmental stages.