I actually think this would be easier to implement than many of the current ID verification methods I've seen being pushed. We already have the infrastructure for selling age restricted goods, this is nothing new. Manufacturers that are unable to restrict their hardware in a "child" mode don't have to do anything and could simply continue selling to adults only.

It's obvious we're moving in a direction where we are going to get these restrictions in one way or another, and this is the only way I've come up with that doesn't come with serious privacy implications.

Most importantly, this solution would be simple for anyone to understand. You don't need to be a cryptography expert to understand there are child safe devices and then there are unrestricted devices for adults.

> China has restrictions for social media and screen time for kids — how do they implement this?

China is much more socially conservative, and less likely to abandon their kids to latest thing.

It's a nightmare to some extent to prevent underage people from consuming alcohol if you want to phrase it that way. But we don't try to ban stores from selling alcohol because of concerns children will be drinking it. Instead we require the store checks for ID.

Passport /citizen ID linked to your WOW account, etc.