Red light money makers
They were going to put a bunch of red light cameras in Toronto, but the contract was cancelled. The contract required the city to shorten the yellow lights so more people would get caught, but Ontario would not change the law that set the minimum length of yellow lights. It was not about safety, it was about making money.
Google "short yellow"
In theory red light cameras should be fine, as Red is Red, it's not like a speed limit that is dependent on road conditions and NIMBI efforts to shift traffic onto a different street... A road posted at 80 is safe at 100 on a sunny day with light traffic, but suicide at 80 in a snow storm but you don't get hit by a camera for that. But as soon as they game the system with short yellow lights they are worse then nothing when people stand on the brake to avoid getting hit with a big fine and points.