The FCC has put a bounty on the heads of all the cellphone-hating vigilantes out there. These GPS and signal jammers are particularly popular amongst theaters, quiet restaurants and in many school systems fighting the good fight against sexting during class. The FCC is calling on folks to stop and to report their neighbors for using these devices -- reason being that they pose serious health and safety risks by interfering with 911 calls and other emergencies in the vicinity. So if you know a so-called 'jammer,' don't hesitate to file a complaint about them to the FCC -