This isn’t that hard to solve. Kids have their own account on the computer. Make it the law that if a computer account is set up as a kids account it must sen

This isn’t that hard to solve. Kids have their own account on the computer. Make it the law that if a computer account is set up as a kids account it must send some kind of not-adult header with all requests. Enforce that in the OS so it can’t be messed with. Leave non-kid accounts alone. Make it the default thing that happens if you set it up as a kids account so anyone can do it.