> It's easy to put this on the parents, but that's not the answer. Otherwise, it would be solved already.

I would argue it must be part of the answer, if it isn't literally the answer. You even kind of hit the nail on the head later in that paragraph:

> Parents on HN are hyper-aware of this sort of thing, but that's definitely the minority.

I would start there. Spreading awareness and social pressure is a tractable problem.