You have an expectation of privacy in location data that reveals your movements in the physical world, and even short-term surveillance of these movements is a search subject to the Fourth Amendment, the U.S. Supreme Court ruled today in Chatrie v. United States. The case involved geofence warrants...
Some flock were installed recently on my preferred route to work, so I changed my route a street over. Ive read one too many stories of people wrongly arrested just because they were shown to be in the area. I hope this somehow limits all this surveillance of normal everyday people, but I won’t hold my breath.