> and that's as useful as self-documenting "i am over 18" or "over 21" for things that require that, without any document checks.
No OS I'm aware of allows non-admin users to add new users to the system. Parents that care about these sorts of things don't give their kids admin access to their computers.
> the rest of the stuff (patches, if you will) comes later.
Unless the legislation allows for such patches through non-legislative process, patches to legislation generally happens on a ~20 year cycle in my experience.