SD-Arcadia writes "I would like to own a device that would make use of GPS (and possibly other) signals without broadcasting my location back to anyone. Ideally it would make use of OpenStreetMaps, downloaded on to the device. Bonus points if it also refrains from logging my past locations, which could be used against me in case the device is seized. This could be a dedicated device, handheld, for cars, or a smartphone/tablet/portable computer. Is there such a product on the market?"