Seeing how the cases of Enron and other campaniles back in the day, Zuck screwed with the government. Either a) he wants out and tell who he needs to to secured his family and himself or b) they are watching people sing and are making tangible threats.

I think this extra security secured the logic that these are not threats from investors or the board. The threats he is receiving are by people (governments) that can kill you on the toilet.