If there was a camera in a supermarket which could be magically programmed to only record an image when it had a shoplifter in its sights, would anyone object? Or, if there was a similar camera outside a pub that only recorded an image when it witnessed a knife or gun fight, would anyone protest? Would there be concern that the cameras were being financed by the fines from successful prosecutions? If it was erroneously claimed that the fines exceeded the cost of the cameras would there be outrage?
Supposing those magic cameras existed, would you hear your neighbour, or workmate, complaining he'd been caught and fined for nicking a tin of baked beans from Tesco's when he was only doing what everybody did, and as an experienced shopper he was the best judge of when to shoplift or not?
It is a small miracle that we have the number of speed cameras that we have, because although they are popular with the majority of the population they are not popular with habitual speeders who are mostly middle-aged men, and most politicians and media pundits are middle-aged men.
Personally, I'd have a speed camera on every street corner, and I'd have them hidden. That would deal with the objection that a camera in one place only moves the accidents somewhere else (for which there is not one shred of evidence).
So, middle-aged middle-class man, boring me to tears explaining that you are a better judge of the safe speed for the road than the highly qualified County Accident Prevention Officer, I have this to say to you: Be grateful that you were only fined because if there were no cameras you might have killed a child by now. Next time you are caught, take the opportunity offered to do a re-training course because I guarantee that you will learn something.