GPS, GSM Cellphone Jammers Hit Mainstream

Via Gizmodo -

Don't get too reliant on that GPS receiver, Magellan, since companies are now starting to release devices that locally block GPS signals. Detectnu's device not only block GPS signals within a 50-meter (164-foot) radius, but also GSM cellphone signals in a 20-meter (65-foot) radius. Another such device—the RJ-G1575 GPS jammer from Radixon Hadrian—blocks GPS signals in a 50-kilometer (31-mile) radius. Now, I can completely understand cellphone jammers (hint: people have no concept of tact in New York City and love to yap about God knows what quite loudly), but blocking GPS? What good does that do, other than give mischief makers a rise?

Now if I can just get one of these installed in my car....