Anecdotally (as an integrator/installer)... I've installed lots of cameras from covert to in-your-face for customers wanting to monitor employee actions or catch employee theft/misconduct, and if anything, the effect seems to be only temporary... meaning once they know there are cameras, they'll usually smarten up for a while, but pretty soon forget the cameras are there and are up to their hijinks again.
We had one instance of a retail customer who had an employee trying to run stolen credit cards through the till to buy lottery tickets, every time his co-worker turned his back... tried it repeatedly on two different tills. swiping each card over and over, like MAYBE it would work this time when it hadn't a dozen times already....
Looked at the "attempted purchase" records from the CC companies, looked up the video... two 1.3MP cameras, one behind each paypoint, caught the whole thing in glorious living color. And these weren't inconspicuous cameras, either - they were box cameras on big J-mounts mounted to a bulkhead less than 7' off the ground. A blind man could have seen these cameras... but the clerk was completely oblivious to the fact he was being recorded in high definition.
Also anecdotally.... as fas as Carlton's "Grandstands" article (which I haven't read), it's my experience that at least as far as DRUNKEN unruly behavior, cameras seem to ENCOURAGE it, especially if they're being broadcast live at the time.