I think someone who read about FB "donating" money for extra police officers decided to "prank" FB and the county police department. The timing is just too precise. One has to question whether FB is really under any threat and whether internal security is enough or not. i spoke before that if FB couldn't keep strangers entering the building or walking pass the campus, that's the fault of the security contractor.

I think there are only two real threats: data thief and employees' mental health under pressure.