To me that's a geo-ip lookup on the online service, which they kinda need to do anyways so seems fine?

(if there are further restrictions then it gets messy, but I feel like that's the current state of things anyways? at least for online services which I'm mostly speaking about here.)

Mostly my point is I don't think attestation is required. I think that responsibility should fall upon parents, and I don't want to have to give my ID to any online sites, because I don't remotely trust them to keep that safe. I'm less worried about them storing a number I send them about how old I am.

There's ~195 countries with 195 sets of laws.

And 50 US states.

Yeah, and frankly if you have a porn site (for example) you already need to deal with the different country restrictions.

Having no restrictions would be great, but since a bunch of countries are passing these laws I'd appreciate having a minimally invasive version instead.