Today's New York Times ran an article featuring highlights from the hacker conference Defcon. One of the items they discussed is an invention called the WASP:
"It’s a remote-controlled plane with a computer in its belly that can fly up to 400 feet above the ground, snoop quietly on wireless networks below and attack one if it wants to. It can also pretend to be a GSM cellphone tower, eavesdropping on calls and text messages that pass through."
This is another reminder that technology enables surveillance today that would not have occurred to most of us a decade ago. That makes the protections of laws all the more important.