We are trees in a large forest. If someone wants to target you, then they will. Be it with a satellite or a disposable camera. In the meantime the best anyone can do is look at trends. So if you are doing something against the trend, like stockpiling uranium in your basement, then they will see it (and I gotta be honest, I am rather glad they can). On the other hand if your trend is to drive to and from work, and go to the mall on Saturdays (along with a 1,10,100 million other people) what is it that they can do?