Every time we take money out of the bank the transaction is recorded, sometimes accompanied with a photograph. At home we may be excused for thinking that at least there, we have a modicum of privacy. It is from home that we make and receive our most personal telephone calls and each one recorded by time and by length. Also which number we have rung to, and which numbers we have been rung from. All this thanks to the day to day technological routines that the telephone companies actually need to retain the quality of their services.
Lets take a normal day, remembering that men and women are creatures of habit.
We wake in the mornings and put on the light or make the fire, and this is observed by our neighbors, to such a degree that they would likely think something was wrong if they did not see signs of life. Then they wait to see you go to work or take the children to school. They in fact know the habitual parts of your life better than you do. Others see you in the car, probably every day at about the same time. Perhaps you walk or take the bus, it matters little, you are observed.