Worth noting: the FBI's GPS case turned on the fact that a person's vehicle is an "effect" in the sense of the people's right to be "secure in their persons, houses, papers, and effects, against unreasonable searches and seizures". The word "effect"; it's right there in the 4th Amendment.<p>The court did <i>not</i> find that people have a reasonable expectation to privacy in public spaces (an argument made by the defense in that case). If you're out and about in public, your location isn't private. This is obvious, because it's clearly lawful for the police to simply follow you around in public.<p>(I'm happy if the police end up universally needing [easily obtained] court orders to collect cell tower logs, but unlike most of HN, I don't see the status quo as particularly outrageous).