They have only recently installed two red-light cameras in my immediate vicinity. Both were placed at intersections which have been problematic.
The first few days, at one of them, they were mainly catching drivers who failed to come to a full stop before making a right turn on a red light. You can turn right on a red light here, but you have to come to a stop first. Failing to do that is a cause of accidents because these drivers are turning into ongoing traffic.
Anyway, these nabbed drivers began squawking that the tickets were unfair because the cameras were only supposed to catch those who had cruised through red lights while driving straight, and they claimed they shouldn't have to pay the fines. For days there were loud demands to have the cameras removed, and hundreds of disgruntled drivers. I was really impressed with how many tickets they gave out in such a short period, simply for failing to stop before turning right. And I was overjoyed about it.
These days you never see police out and visible around here, so people know they can drive badly without fear of being caught. Red lights, stop signs, speed limits, all seem to be viewed as "optional" for too many drivers. So, if the red- light cameras can help to improve safety, at all, I'm in favor of them. And, if they generate revenue too, that's wonderful. I see it as a win-win situation.
As to the yellow-light problem, there should be some reasonable state-wide standard for the length of the yellow light. Although, no matter how long it is, there will still be drivers who will enter the intersection after the yellow-light has come on, or who will speed up to get through it.