The Federal Communications Commission has fined a Readington man nearly $32,000 after concluding he interfered with Newark Liberty International Airport's satellite-based tracking system when he used an illegal GPS jamming device in his pickup truck to hide his whereabouts from his employer.
Disrupting satellite signals can hinder air traffic controllers’ ability to receive accurate information about a plane’s location in the air and on the runway.
https://www.nj.com/news/2013/08/man_fined_32000_for_blocking_newark_airport_tracking_system.html