The problem with surveillance is not primarily that some bored officer might learn about some embarrassing private detail (although this is a problem as well). The fundamental problem with surveillance is that it changes people. People under surveillance behave differently than people who are not monitored – differently than free people.
Unfortunately, this fundamental problem has just been proven in Germany
Which is yet another of the many many reasons why we should be highly sceptical of government surveilance through CCTV coverage, unfettered wiretapping and other forms of personal monitoring.