If we can imagine it, it's a good bet that someone else has already thought of it and has made contingency plans.
Do the authorities have the right to know where you are all the of the time? Why?
We don't have to go to great lengths to see some issues arising. Here in Ottawa, there are several places around town (coffee shops and small retail outlets) who no longer accept cash. I get it, handling cash is a pain for them. This will probably only expand. Will it be the case one day soon that using ATMs to withdraw cash will correlate with illegal activities and be worth monitoring? (A friend of mine joked the other day that the only reason to withdraw cash from an ATM is to buy illegal drugs or visit sex workers. Funny line maybe, but with a grain of truth too.)
One aspect that I've noticed as a fan of British TV detective fiction is how often the solution of crimes (on TV anyway) relies on the extensive British public CCTV network. I have no idea if this is creative license or not. I see some unbelievably silly things on CSI-type shows, identifying faces via enhanced analysis of reflections in concave mirrors from across the street in the dark, so I know that TV shows lie.