alt Hacker NewsThey need a warrant to physically alter or attach things to private property to track them. They don't need a warrant to post monitors and record what they see in plain view in public spaces with no expectation of privacy. The entire concept of a license plate, universal around the world, works against the idea that the state can't monitor your car.
I'm not saying ALPRs don't pose new privacy problems and, in the long term, depending on how they're used, even constitutional problems. But clearly the Anti-Pinkerton Act doesn't get you anywhere here.
> They don't need a warrant to post monitors and record what they see in plain view in public spaces with no expectation of privacy.
They do if it's done to the point where you can track individuals around the city.
https://www.ca4.uscourts.gov/opinions/201495A.P.pdf
> The AIR program uses aerial photography to track movements related to serious crimes. Multiple planes fly distinct orbits above Baltimore, equipped with PSS’s camera technology known as the “Hawkeye Wide Area Imaging System.” The cameras capture roughly 32 square miles per image per second. The planes fly at least 40 hours a week, obtaining an estimated twelve hours of coverage of around 90% of the city each day, 5 weather permitting. The PSA limits collection to daylight hours and limits the photographic resolution to one pixel per person or vehicle, though neither restriction is required by the technology. In other words, any single AIR image—captured once per second—includes around 32 square miles of Baltimore and can be magnified to a point where people and cars are individually visible, but only as blurred dots or blobs.
> On the merits, because the AIR program enables police to deduce from the whole of individuals’ movements, we hold that accessing its data is a search, and its warrantless operation violates the Fourth Amendment