[Justa]

How about when it's used to detect political dissent? Monitors could spam polical speech/propaganda in select public locations and the cameras would scan people for signs of dissent. Then the Political Crimes Prevention Unit would pick-up the pre-criminal and subject him to some 'crime prevention program', like, say forced viewing of CNN. His crime prevention program would continue until he no longer showed signs of dissent.

[Paul C. Jesup]

That is already happening in the some of the major cities where they have put cameras in public places.