[darkarmani]

> Make it a legal requirement for parents to set up this option for their children on every device they use.

Why? Let the parents decide -- they now have the controls they need.

> Make it illegal to send invalid "safe content" headers.

Just make them cryptographically signed. Anything without a valid signed header is "adult".

[codedokode]

> Just make them cryptographically signed.

Yes this is better, let some organisation issue these signatures.

[mr_toad]

For a ‘reasonable’ fee of course.