Can’t think why anyone would even ask but it seems someone did: From Olivia Solon at the Guardian:
One day last year, John Evans (not his real name) received a message from his manager at Facebook telling him he was in line for a promotion. When they met the following day, she led him down a hallway praising his performance. However, when she opened the door to a meeting room, he came face to face with members of Facebook’s secretive “rat-catching” team, led by the company’s head of investigations, Sonya Ahuja.
“It’s horrifying how much they know,” he told the Guardian, on the condition of anonymity. More.
Reality check: And there was something else we needed to know?
See also: Mark Zuckerberg as US prez? Don’t unfriend the idea.