I guess I'm old school, but Zuck has shown disdain for the privacy of users in the past, FB actively tracks the movement of users across the net (likely without many realizing), and I'm under the impression that this culture that emphasizes sharing every fucking thing is more dangerous to people than the US government trying to get at data that they probably already have.
Don't get me wrong, I don't like that the US government is doing this, but I don't trust FB at all.
Nothing to see here folks. Just the old tug of war between governments and corporations for power, while the actual citizens get trampled.