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by mcbridematt 2748 days ago
Didn't we (sort of) try age restriction metadata during the '90's with P3P? (or a closely related technology.. the name escapes me)

If you tightened the settings in Internet Explorer it would only allow you to access sites with P3P data - which was pretty much _nothing_ on the internet.

https://en.wikipedia.org/wiki/P3P