<<Is there not a presumption of guilt in all this?
<<They are cops, they must be brutal corrupt thugs, right. They don't need no stinkin rights. >>
I think what you are missing is the authorization of deadly force.
Even if you assume that cops are no more likely to be brutal corrupt thugs than professors of Greek philosophy, the cops are authorized to use force and the professors are not. So it behooves society to excercise a little more vigilant surveillance over the activities of a bunch of cops than over a bunch of professors of Greek philososphy.
There's no real purpose in videotaping the random working-day activities of professors of Greek philosophy. Their privacy would be violated with no corresponding increase in public safety.
The cops, on the other hand, even if as non-violent by temperament as the professors, or no more or less belligerent, are nevertheless armed and possibly dangerous. A little vigilance here would not be out of line. Do you really not see the difference made by one group's being armed and authorized to use deadly force in certain situations?
And of course, in real life, cops ARE more brutal and thuggish than professors. Live in the real world, even though in this particular argument, you don't even have to.
I guess what fascinates me is WHY, when you KNOW that compared to other groups, cops ARE more brutal and thuggish, you persist in pretending that they are not. What is your point? Why live in a dreamworld? Do you really think there are as many victims of unjustifiable violence at the hands of the professors of Greek philosophy as there are at the hands of American cops?