For those interested on the question of age verification and GNU/Linux: be aware that Systemd v261-rc1 was recently released. It now implements an optional birth date field in the JSON user database (see second item under “Other changes”).
The implementation of this field was prompted by age-verification or -attestation laws.
Yeah, they should do an init system instead of reinventing an operating system.
That’s the main problem I have with it.
Of course advocates of systemd will say it’s modular, but there is some kind of capture process going on - you have to relay on the systemd solution, because it fits nicely into the systems ecosystem …