The problem is that it’s considered politically incorrect for elementary schools to teach common sense.
The UK has a large and growing population of uneducated, unemployed nutcases. They’ve always been there, of course, but we’ve managed to cultivate vast estates full of useless parents producing loads of useless kids, and we’ve made no attempt to educate those kids and give them a life better than their parents. It would be technically possible to do so (interesting fact: kids grow up to reflect the behaviour of a society of peers, not their parents). We just choose not to.
The average British kid thinks he should have a retinue of ass-wipers to sort out his every little problem. If he doesn’t have lots of money, a car, and beer at the weekend, that’s somebody else’s fault. Usually the Poles. The operation of society - including what used to be called ‘respectable’ society - now revolves around skimming and scamming, because so few people actually have useful life skills. In that environment, you do get quite a fair bit of casual violence directed at (say) drones in Council offices. Hence the notices on the walls.