Comment by atonse

Yeah the non-anonymity part of it is troubling.

In HN comment thread for another post, I had hoped that we could come up with a rating system like we have with Movies, TV, Apps, mediated by HTTP Headers.

I feel that is all we actually need. Then I can configure a browser a certain way, and the site publisher can just send a header saying "X-Content-Rating: Mature" or something along those lines, and that's it. It would be anonymous and opt-in.