EFF urged the high court of Massachusetts to protect the rights of passengers in cars that law enforcement are tracking with GPS surveillance technology, arguing that both the driver and the passenger of a car have legal standing to challenge the collection of sensitive location data gathered by the GPS devices.

In June 2013, the Massachussetts Supreme Judicial Court agreed with EFF, finding that passengers had standing to challenge GPS surveillance because people can reasonably expect that the government won't electronically monitor their movements through the use of a GPS device.