full story at link: http://www.wired.com/threatlevel/2011/05/gps/
Kathy Thomas knew she was under surveillance. The animal rights and
environmental activist had been trailed daily by cops over several months,
and had even been stopped on occasion by police and FBI agents.
But when the surveillance seemed to halt suddenly in mid-2005 after she
confronted one of the agents, she thought it was all over. Months went by
without a peep from the FBI surveillance teams that had been tracking her in
undercover vehicles and helicopters. That's when it occurred to her to check