The U.S. Court of Appeals for the Ninth Circuit decided government can monitor you, sneak into your driveway and attach a GPS tracking system to your vehicle without a warrant. That this doesn't violate your Fourth Amendment rights.

If this keeps up, it is foreseeable someone in the private sector will offer for a charge, a garage you can take your vehicle to be inspected for unknown GPS tracking systems. Interestingly, it difficult to find on the market a reliable GPS detector to uncover these systems. Some satellite GPS tracking systems send information intermittently making it difficult to locate them when well hidden on a vehicle. Non satellite ground GPS systems are easier to find and are often larger units.

"By comparison with that existing today, all the tyrannies of the past were always infected to some extent by liberal ideas, and were content to leave loose ends everywhere, to regard only the overt act, and to be uninterested in what their subjects were thinking.  Even the Catholic Church of the Middle Ages was tolerant by modern standards.  Part of the reason for this was that in the past no government had the power to keep its citizens under constant surveillance.  The invention of print, however, made it easier to manipulate public opinion, and the film and the radio carried the process further.  With the development of television, and the technical advance which made it possible to receive and transmit simultaneously on the same instrument, private life came to an end.  Every citizen, or at least every citizen important enough to be worth watching, could be kept for twenty-four hours a day under the eyes of the police and in the sound of official propaganda, with all other channels of communication closed.  The possibility of enforcing not only complete obedience to the will of the State, but complete uniformity of opinion on all subjects, now existed for the first time."  George Orwell, "1984"  

gestapo scum. 

 Sounds like there is now an emerging market for a GPS-detector! :)  Scan your car every day, just to make sure your jealous spouse hasn't "tagged" you.

If they do this like they go to the wrong house in a drug raid, they will get all mixed up.

If we can get trackers on all the cars, and they use the info from them, that could be argued to fall under racial profiling. Of course, racial profiling doesn't count if you are a citizen because, being a citizen of the same government makes us all of the same race.

Put a "Private Property" sign on your car so you can get them for trespassing when you find your info in their databases.