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...
It only applies to the government, by requiring 4A protections for geofence requests. A judicial warrant will be needed for the cops to go to Google or w/e and say, “Give us everyone in this area on Tuesday Aug 9th”. Which ofc will include innocent ppl along with the accused. It won’t directly efffect private recording and data collection.
There are tricky issues around private collection. Conflicting rights between parties, even. Anyway, it’s possible that this + other cases like Carpenter v. United States could restrict gov purchases of loc data on the open market, not just direct requests to Google. NAL, and IDK how it might go. I imagine we might see further lawsuits as this bubbles through the legal system and there are 2ndary issues that arise from it.