How do you see this any different than the police going through your garbage? No warrant needed for that if it's on the curb.

>Government agents can sneak onto your property in the middle of the night, put a GPS device on the bottom of your car and keep track of everywhere you go. This doesn't violate your Fourth Amendment rights, because you do not have any reasonable expectation of privacy in your own driveway - and no reasonable expectation that the government isn't tracking your movements.
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>Oh good grief! The 9th circus can't even get this one right. Prepare for the Supremes to screw it up as well. Privacy be damned.
>http://news.yahoo.com/s/time/08599201315000
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>The court went on to make a second terrible decision about privacy: that once a GPS device has been planted, the government is free to use it to track people without getting a warrant.
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>So, no warrant to put on the device and no warrant to maintain it. Sounds like the new foundation of America allright.