USA - One phone company "provided law enforcement agencies with its customers' (GPS) location information over 8 million times between September 2008 and October 2009."
How did they do it?
Automation... "a new, special web portal for law enforcement officers."
How did this leak out?
A company employee "who described it during a panel discussion at a wiretapping and interception industry conference, held in Washington DC in October of 2009. " (more) (video)
FutureWatch...
This will become commonplace.