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...
Doubtful. All they have to do is cry “terrorism” and they’re allowed to do whatever they want.
Yup.
Edit: or “espionage.”