But who will surveil the surveillants?

Apparently, they will.  True, it's not exactly the NSA scandal, but when "the very people asked to fight terrorism are claiming that the city's new antiterrorism tools have been bluntly and illegally applied to the exercise of their own civil rights," the comparisons become inviting.  And one has to look for one's poetic justice where one can find it these days . . . .  Having been on the wrong end of these cameras myself once upon a time (and having been involved in bringing this kind of lawsuit, too), I'm sympathetic to the police who are complaining about being photographed.  Good luck to them; courts have held for years that police surveillance, photographing and video-taping of public political demonstrations are perfectly fine under the First Amendment, no matter how much protestors complain about their right to dissent being chilled.  I assume that these cops will get the same bum's rush, but one never knows . . . .