This is exactly the Californian age assurance law, down to the primary age indicator/age signals logic.

waiting for the other shoe to drop

Parental controls have existed for ages, many parents are just too lazy to use them, let alone actually discuss things with their kids and stay involved in what they are doing.

They got it right for now

I call this the framework of fuckery, they start reasonably, and then expand into insanity. All it takes is some updates to the EULA and it all changes behind your back.

This is why you have people asking Amazon to lock their doors for them because turning a key requirtes a dozen steps across the room...