“… If the Supreme Court finds that law enforcement were within the law when placing a GPS tracking device on the car of suspected drug smuggler and nightclub owner Antoine Jones, it would open the door for even more egregious violations of our privacy. This decision would essentially allow the government to monitor anyone and everyone’s movements without a warrant for any reason or no reason at all… ”
via Activist Post: U.S. Supreme Court may allow the government to track phones without a warrant.