I was talking about "Photo Cops" this weekend while driving on the Garden State Parkway and saying "if they ever introduced [photo cops] on the GSP, people would be screwed." Referring, of course, to the fact that it is a 55 mph road and everyone was driving 70.
They tried having photo cops on Route 80 in NJ back in the late 80's or early 90's (don't quite remember) and it was simply a camera sticking out of the back of a van. Trip the speed limit, take a photo of the driver, mail summons to person. From what I remember at the time, it caused a bit of an uproar after a few politicians got pictures of them driving with their mistress and the summons envelope being opened by their wife.
Speed enforcement is fine; it keeps people relatively sane with their driving habits. I personally feel that the dangerous ones on the road are the ones who are driving more than 5-10 mph away from the average that everyone else on the section of road is driving. But sometimes you have a clear shot where there is nobody around you and goosing it up several mph to gain some time isn't that big a deal. If an automaton is going to penalize me without any context, that's where I draw the line.