"Give websites your ID" requires doxing yourself to every site out there, including forums etc which will heartily embrace the excuse to dox you.
"Magic ZKP faerie dust" still requires locked down corporate controlled devices implementing remote attestation that destroys everyones ability to run the code of their choosing on their device (see UK's system). Of course Google advertises the cool seems-like-privacy ZKP part rather than the totalitarian remote attestation/"Safety"Net/WEI part.
Filters on the device, including preventing kids booting/installing alternative software only requires devices to prevent easily running other OS images on demand. Boot signatures suffice. And if designed to support it, filters could also be run on the router or by a mobile provider.
That last approach is still the least freedom-destroying, by far.
"Magic ZKP faerie dust" still requires locked down corporate controlled devices implementing remote attestation that destroys everyones ability to run the code of their choosing on their device (see UK's system). Of course Google advertises the cool seems-like-privacy ZKP part rather than the totalitarian remote attestation/"Safety"Net/WEI part.
Filters on the device, including preventing kids booting/installing alternative software only requires devices to prevent easily running other OS images on demand. Boot signatures suffice. And if designed to support it, filters could also be run on the router or by a mobile provider.
That last approach is still the least freedom-destroying, by far.