You've heard of the Child Catcher? Meet the WiFi Snatcher
 

Remember the Olympic ban on WiFi hotspots to ensure the games' corporate sponsors could sell you back access at a premium? The threat to seize or eject anyone caught using such gear seemed hollow -- after all, how could you be found in a crowd of 90,000? It turns out, LOCOG have employed WiFi police, chasing down unauthorized signals with their big red detectors. Although we should give them some credit -- you'll certainly see them coming from a mile away.

http://www.engadget.com/2012/08/02/o...wifi-snatcher/