I think firstly the kids need to get education about this subject in school. The dangers online, the tools to use to protect oneself etc.

Secondly the parents need some similar education, either face-to-face education or information material sent home.

It will not prevent everything, but at least we cannot expect kids and parents to know about parental control features, ublock origin type tools or what dangers are out there.

We have to trust parents and kids to protect themselves, but to do that they need knowledge.

Of course some parents and kids don't care or do not understand or want to bypass any filters and protections, but at leaast a more informed society is for the better and a first step.