[scratchyone]

sure, but plenty of software already exists for those devices to block adult content and social media. it works just fine without a header. its actually even better, because that software can even block nefarious websites that would never comply with adding a header

[skybrian]

Blocklists are useful, but a hint from the website that, actually, they don't want to cater to children would be useful when those blocklists aren't up to date.

[goalieca]

Yeah, DNS blocking and browser lists are simple too. Sure. So why problem are the politicians trying to solution for?