Rather than a "Going Dark" problem, ours is one of "Going Light". We all now carry a GPS tracking device in our pocket that contains a microphone and video camera. We are quickly putting a microphone (and sometimes camera) in every room in our house, with devices like smart TVs and Amazon's Echo. License plate readers line the roads, and face recognition (as well as video cameras) are located everywhere crowds gather. All our credit card transactions are slurped up by the government, as are our phone metadata (even more so since the so-called USA FREEDOM ACT).
The question is whether the "warrant upon probable cause" is sufficient protection for the Going Light problem? Or do we need more limits?
The War on Drugs and the War on Terror have made a police state out of America. We jail 10 times more people, per capita, than other free nations (more than virtually any other nation). Law enforcement steals more through "civil asset forfeiture" than burglars do. We can no longer travel without showing our papers at numerous checkpoints. We can no longer communicate nor use credit cards without a record going to a government controlled database.