CSIRO and the Australian privacy commissioner suggested this path to the Australian Government a few years ago.

I'm not a fan of technology fixes for social problems but i do think this may be in the sweet spot.

I see a lot of people here don't agree. I think they may not appreciate quite how concerned a lot of the community is about the effects of networked communication on minors. I'm not here to change people's minds, but this isn't a US problem it's a global one, and US constitutional rights views do not predominate worldwide.

Google has more customers outside the US than inside, and has more business with entities subject to non US laws than solely US domiciled entities.