Surveillance will be the death of the cell "phone". What are the arguments for bringing your phone with you? I'm imagining a future where politicized geofenci

Surveillance will be the death of the cell "phone". What are the arguments for bringing your phone with you? I'm imagining a future where politicized geofencing has observed people gathering together and is prosecuted precisely becaused it was geofenced. It's mindboggling and there has to be other solutions convenience technology that do not sacrifice privacy.