Facebook reports to the FBI

I have it on good authority that if someone makes a terrorist threat on Facebook, even if it's not publicly available, the FBI will literally show up at their door within 24 hours with a bomb squad.

Other crimes might set the system off as well. You've been warned!

There's also this case where a blog post possibly led to someone have a GPS tracking device mounted on their car without a warrant. The 9th circuit denies that the 5-0 need a warrant for such things, but that should be overturned.