“We Know Where You’ve Been” 0

The ACLU explores location data and its uses. From the blurb accompanying the video:

As long as it is turned on, your mobile phone registers its position with cell towers every few minutes, whether the phone is being used or not. Since mobile carriers are retaining location data on their customers, government officials can learn a tremendous amount of detailed personal information about you by accessing your location history from your cell phone company, ranging from which friends you’re seeing to where you go to the doctor to how often you go to church. The Justice Department and most local police forces can get months’ worth of this information, without you ever knowing — and often without a warrant from a judge.

Not that it does much good, but I keep the GPS turned off in my phone unless I actively need it, even though various apps keep nagging me to turn it on to “provide better service.”