Don’t get me wrong, I’m all for privacy. But between setting up the birthdate when creating my children’s local account on their computers, and having to send a copy of their ID to every platform under the sun, I’d easily chose the former.
I’d even agree to a simple protocol (HTTP X-Over-18 / X-Over-21 headers?) to that.
and to prove its not actually about safety and instead about control: parents are already responsible for what kids do online and could be charged using existing laws. but… where is the overreach in that?!