I'm not sure I see how IPv6 would really make that any easier? Privicy extensions or not... Forging a MAC address is trivial.. If that's all you use to enforce

I'm not sure I see how IPv6 would really make that any easier? Privicy extensions or not... Forging a MAC address is trivial.. If that's all you use to enforce the registration, it will be trivial to bypass! And - if government wants to do this.. There are easier ways.