The SCALE of the surveillance is really the important thing. Many comments here correctly point out that you don't have an expectation of privacy in public. Bu

The SCALE of the surveillance is really the important thing. Many comments here correctly point out that you don't have an expectation of privacy in public. But that rule was really created envisioning the occasional person observing the occasional person/act/event. Even a cop tailing you is so expensive that its not deployed everywhere. The rule did not anticipate a system where every person is observed all the time. This is a situation where "quantity has a quality all of it's own". Mass surveillance needs to be held to higher standard than regular public observation.