The totalitarian state watches everyone, but keeps its own plans secret. Privacy is seen as dangerous because it enhances resistance. Constantly spying and then confronting people with what are often petty transgressions is a way of maintaining social control and unnerving and disempowering opposition.... And even when one shakes real pursuers, it is often hard to rid oneself of the feeling of being watched -- which is why surveillance is an extremely powerful way to control people. The mind's tendency to still feel observed when alone... can be inhibiting. ... Feeling watched, but not knowing for sure, nor knowing if, when, or how the hostile surveyor may strike, people often become fearful, constricted, and distracted. - www.groklaw.net