Comment by idiotsecant

The <meta name="rating"> html tag has existed since like the 90s. If you legitimately just want to 'protect the children' just enact legislation saying that adult content is responsible for setting this tag. Then parents can decide what their children can and can't see via browser settings. No giant biometric database, no invasive user mapping, no leaks, no creeping techno-feudalist state.

Collecting user biometric data and trying it to a nominally anonymous user identity is not required here.

This is 100% 'won't someone please think of the children' pearl clutching to hide what's actually going on - furthering control of the online exchange of ideas.