I suppose, at the end of the day if we didn't speed we wouldn't have to bother about sneeky scameras. We don't rob banks because we know it's illegal but we all speed, despite it being illegal, funny old world.
When we did the Brighton run the other week there were some strategically placed vans on the way in and out of Brighton, did they reduce speed on the day? NO they simply took money from peoples' pockets. Those same people could have then gone on to have a serious accident 50 yards after the scamera that they didn't see because their speed wasn't cut along that stretch of road.
A few plod bimbling about on bikes along the same stretch of road, in full hi vis uniform that all could see would keep everyone within the speed limit and would massively reduce the chance of a serious accident.
So, is it about revenue or safety.... you decide.