My point is that all cars and cell phones already have GPS trackers installed. Since there is no need to place a device on a car or person to track them, the police just have to access the already existing records. If it is OK to place a device on a car without a warrant, wouldn't be OK to access tracking records without a warrant?
I agree with tptacek on this one: Even if they have the same effect, they're fundamentally different things. The difference is that by placing a tracker, you really are just tailing them with an electronic device of your own. But co-opting their phone or forcing a company to divulge records without a court order is essentially a violation of their property rights and protection from unreasonable searches.
