When cameras are deployed in places of high accident areas, such as nearby schools, junctions etc they will certainly help to reduce accidents. This is how the cameras started all those years back, however since that time there usage has been abused by councils across the land as a revenue generator. Personally I have no issue with these cameras (specs, gatso etc etc), if a driver or rider obeys the law then there is nothing to worry about.
A more serious issue being a biker is the number of car driving w*nkers that STILL use mobile phones while driving along, that scares the shit out of me. To me (at least) this is far worse than general speeding as, at least when speeding, the driver is at least concentrating on the road ahead I assume.
Answer. Okay, drop the cameras but increase the fines on mobile phone use while driving, something like this:
1. First offence using mobile phone - £2,000 plus 4 points
2 Second offence using mobile phone - £3,000 plus 5 points
3. Third offence - at least 6 months disql. + driving re-test + £4,000 fine
That might help.