“The right to privacy is the pre-eminent right of any democracy.”
Obviously the CIA and NSA collect fb data. They form personality profiles. Examine what you post for leverage. Facebook tracks every site you visit outside of it which also gives them a lot of clues about who you are as a person, they can track you via your GPS, listen to your conversations, etc. The more concerning part is we all know this and still use it. We are comfortable with our servitude and surveillance.