If all of your details are removed from your location data, is it anonymous?
No, because people have homes and jobs that they go to most days. And pretty much every combination of home and job location is unique and identifiable.
Marketers won’t care about individuals, but data can be resold to bad actors or governments.
Excellent article from the NY Times:
Yet another [anonymised journey data] leaves a house in upstate New York at 7 a.m. and travels to a middle school 14 miles away, staying until late afternoon each school day. Only one person makes that trip: Lisa Magrin, a 46-year-old math teacher. Her smartphone goes with her.
An app on the device gathered her location information, which was then sold without her knowledge. It recorded her whereabouts as often as every two seconds, according to a database of more than a million phones in the New York area that was reviewed by The New York Times. While Ms. Magrin’s identity was not disclosed in those records, The Times was able to easily connect her to that dot.
The app tracked her as she went to a Weight Watchers meeting and to her dermatologist’s office for a minor procedure. It followed her hiking with her dog and staying at her ex-boyfriend’s home, information she found disturbing.