[codedokode]

This should work the other way: a website must send a header that the content in the response is safe for those under 18. If there is no header, the browser doesn't display the page. It is easy to implement and there is no need to change existing websites for this.

[herbst]

I like the header idea but it's the wrong way around. Let's make the header a law, and then consumers can decide themselves.

[loa_in_]

That would make all older web content become inaccessible

[codedokode]

Only for those under 18, not for anyone else.