[hcfman]

I suspect that it is technically possible to make an anonymous identification service because the result to the social media site just had to be yes or no.

In the Netherlands you have a government identification service that identifies people to other government sites. And a bank service that uses the banks identification service also roll to identify to other sites.

Technically it would be possible to delete any trace afterwards.

However. I have never ever in my life seen any government choose not to take advantage of an opportunity to exert more control over their citizens if the possibility exists.

Plus rather than force it on everyone it should be a choice of the parents. Clearly not doing this is better but in the absence of that parents deciding is better for the others.