People under age can obtain fake IDs, all over the world. This is illegal, but it still happens. At some point, it is ultimatey a parents responsibility to prevent their children from doing so by acting as a parent to their child and preventing them from engaging in destructive behavior. This is established law, even, in many countries, where a parent can be held accountable for the criminal actions of their children for failing to prevent it.

And frankly, I don't give enough of a shit about other peoples' kids to believe that internet usage should require identification like is being pushed by major governments. I want good things for these kids, I want them to grow up in a good society and a good world, and I dont want harm to come to them. But I recognize that a "good society" and a "good world" and one that minimizes harm to people is one where information is available without restrictions and without censorship and without the risk of a government that might decide it wants to commit genocide against you in the not-so-distant future using your search history to persecute you. Pardon my riffing off Flowbots' Handlebars there, but this really is the world that people live in today; powerful world-stage governments want to restrict information about topics they do not like, and are persecuting people who posess this information; the next steps are very, very well documented.

Creating the monster we are watching grow is not worth anything anyone could ever promise you.