Quote from Chillax;137217:
A person generally travels from public place to public place with a car. If you didn't want your car to be seen or tracked, you would take a side road and park in a location farther and more secluded than the area you would want to go to. As cars have distinct license plates, it's not hard for a policeman to ask an unknowing bystander if he/she saw the license plate and for other information, which is probably more information than the policeman will ever get from this GPS tracking device, which is why I'm still not convinced that this is an entirely bad thing. Would it be any different if a policeman decided to track you by foot or by police car?
Because a policeman/agent/whoever can't legally track you without a warrant (although I believe they've already got exceptions for 'probable cause'). I'm all for it if they have a warrant in the first place. And yes, car tracking isn't 100% same as person tracking, but it's
along the same path, which is the point I'm making in the first place. They can, without you knowing, legally and with no explanation needed to you, monitor you. You seem to think this isn't such a bad thing, I disagree. I think it has a strong parallel with those for/against monitoring how you use your internet...but I'm getting off topic.
The sites I linked to talked about why "If you're not guilty you have nothing to worry about" is a horrible position to argue, they don't deal specifically with GPS car tracking.
And I disagree, "Innocent until proven guilty" applies to all aspects of being an American citizen, it's not just 'applicable at trial'.