The logic of having users update the locations of speed cameras seems faulty. People add cameras at locations where they've seen mobile (van mounted) cameras, they add CCTV cameras as speed cameras, they add average speed cameras and anything else it seems. That results in Tomtom reporting cameras in all sorts of silly places. I notice also that if I try to remove them, I get an audio message "camera removed" then next time I pass, it's back again!
So this just doesn't work.