The e-mail address also has a use, for important notifications. There are cases where the OS tries to send an email. But as I mentioned, I don't even know where to set it I've never been prompted and if I was I would leave it empty.
And you're free to not fill out this field aswell. Full name is probably a lot more unique and sensitive than birthdate
Do you think it's a good idea for operating systems to comply with 1 or 2 exceptionally retarded state laws? The full name is as far as I know never exposed to websites right?
Computers need to stay what they've always been. Chips that we run our programs on. Linux is the last free (as in freedom) option and they will try to take that away too.