A well regulated militia being necessary to the security of a free state, the right of the people to keep and bear Lego bricks shall not be infringed.
Be as it may, the simple act of a country denying entry isn't a human rights violation.
That's right. Nor is simply asking for email addresses or phone numbers.
It may be. I have several e-mail accounts, only one is in any way tied to my meatspace identity and I take precautions to keep it that way (privacy extensions, logging from a virtual machine, etc). If I give them one of those, such a tie is created, hence - my privacy has been violated.
Another problem: I don't have twitter account. If I get denied access to USA because of it, wouldn't it violate my right of association? I made a decision to not be associated with Twitter and the government punished me for it - IANAL, but it sounds like a textbook definition of violation.
Doubt isn't the opposite of faith; it is an element of faith. - Paul Tillich, German theologian and historian