Natural result of that is catch-22, parent can't actually stop teenage kids from such activity except through what amounts to torture. As always either way, the parent is damned.
Increasingly this is what the tyranny of the majority is in the western world. People who don't have kids, or only limited experience with kids, declaring that parents are neglecting or abusing their children because they don't behave the way the hypothetical ideologically pure parent would. Almost every single one of them has a cell-phone and the second they see something they disapprove of they can call CPS at the drop of a hat and make your life a living hell, even if you are 'innocent' of even whatever BS they made up.
As always, it's just a smug attempt at moral superiority. They want the intoxicating power rush from threatening and imposing on parents, with none of the responsibility, and the state is all too happy to provide it to them. Just punish and then rest soundly knowing you have no kids of your own for which you could be prosecuted.
From what I've witnessed, the most common complainants were authoritarian mothers who treat their own child(ren) as helpless irrespective of biological age, and teachers, usually with families of their own, who treat non-violent "quirks" beyond their comprehension as a sign of malfeasance. In both cases, lack of familiarity with children is not the issue. Instead, their previous "successes" with raising/teaching children cement a narrow and selective expectation for how children must or must be made to behave. The motivation in either case is a desire for control. The ideological/cultural angle is, at best, a sincerely held rationalization, but is more likely an instinctual employment of thought-terminating cliches/kafkatraps to justify getting their way or make dissenters look/feel unreasonable.
This isn't quite true. A person's adult child isn't going to be taken away by CPS.
Welcome to America where you must watch the kid every second until they turn 18, except at the moment they turn 18 they must be booted from the house to figure everything out all at once with nothing more than a minimum wage job, a gun, and rents that reach the stratosphere.
This must be a regional thing?
I live in New England and I always see kids out and about with no adults around supervising. Especially from 1-3PM on weekdays when school lets out. Maybe a side-effect of walkable infrastructure.