A device should be able it indicate in its browser headers whether its primary user is an adult or a minor and the service can react accordingly.

I can already see that being used for targeting children with specific ads on the internet.

I WANT TO GET OFF MR. BONES’ WILD RIDE!

I have to pirate the prime video shows even though I have amazon prime. It just won’t let me watch at more than 480p because I use the evil LINUX.