Lawfully, when somebody Registers to Fakebook you give every permission to them. The word Register means that you give the Ownership to the person/company and they now give you the Permission to use it.
Just like everything else that you believe you must register like Cars and Children, you give right of ownership away as soon as youve registered it.

People need to learn the LAWFUL meaning of words, because thats how people are being controlled (mostly).