True, and that'd be the best method by far. A European politician recently proposed this.[0] The issue is that a single service can't just implement this. If I'm a service and I need age verification, I need something that I can implement by myself.

[0] https://democrats.eu/en/protecting-minors-online-without-vio...

> The issue is that a single service can't just implement this. If I'm a service and I need age verification, I need something that I can implement by myself.

I don't understand. A simple if age<18 check is quite a lot easier to implement than doing age verification yourself, or even shopping it out to some other "partner".