Here in the Houston, TX area the issue was never opened to any form of public discussion, the red-light cameras were just installed. Of course, the local "dignitaries" tried to pass them off as efforts to increase safety at intersections, but most sentient humans could see through that fog of deception and really understood that revenue generation was the primary purpose of those items. The "citations" issued were civil, not criminal, and a lot of citizens just refused to pay the fees (they could not call them fines, I guess). The city hired an organization to try to collect the delinquent "fees", but in the end the citizens forced a vote on the issue by getting enough verifiable signatures on a petition. The city was already in a contract that had a huge buy-out figure, so there was a hard-fought campaign to get enough votes to keep the cameras. In the end, the public spoke loud and clear and the cameras are now either gone or non-functional. I have no idea how the collection efforts have proceeded, but I do know that other than reporting the issue to some credit agency there ended up being nothing the city could do about refusals to pay.
Smaller cities (such as Sugar Land) continue to use the red-light cameras. Most of us know where they are and just avoid those intersections, as they put the cameras in the high-traffic areas. That does create a minor nuisance for us drivers, but not so much a nuisance as being sent a "bill" for something we may or may not have done.
There were legal issues, too...such as, how do you cross-examine a photograph? In our country the defendant is entitled to cross-examination in order to impeach the testimony against them...no opportunity for that if the testimony is just a photograph. Sure, the police could have issued citations, citing "...full faith in the veracity of the photographic evidence", but that didn't seem to develop and I can think of a whole bunch of reasons why it didn't.
I don't know how things work in GB or AU, but if y'all have the right to petition against laws that seem unjustified, it might work there, too. People get pissed off and the anger can spread like wildfire, but in this age of complacency it's often easier to just mind your P's and Q's than to sign a petition and I think many choose that option. Sad....our country seems to be in a delicate balancing act that involves legalizing some rather common activities (such as smoking pot) and criminalizing (for lack of a better term) other common activities (running yellow or "pink" lights, so to speak).
Here's hoping y'all can have the same success some of our American cities have enjoyed in getting these things BANNED!!!
Cheers!
Doug