This happens all the time at a camera near me, its obviously 40 with signs near the speed camera saying so. But still people slow down to 20-28mph and create a bit of a queue. I've never been caught by one, so when its clear I just maintain my speed at about 42 mph as I know my speedo over reads by this. Its just wasting time a fuel for everyone by having to slow down there.
They are being silly right?