While I'm in favour of limiting social media for kids, there doesn't seem to be a right way to do it unless this system doesn't store identification data, just confirms their age and deletes everything.
It's possible to build an identity system that can assert certain properties about a person (eg. "older than 16") without revealing any other details about that person. Similarly, it's also possible to build such a system where the identity system can attest these details without knowing which website is being accessed. That way, the social media site (or whatever other "adult" service) can validate the user is old enough, while the identity system doesnt track who is using what.
there is, identify users with anonymous code bought exactly same as cigarettes and alcohol in shops where they don't write down your data or don't even have look at your ID card if you look old enough
any age identification done online is not anonymous
