In the US red light laws depend on state. There are certain states where as long as you have passed the first corner of the intersection (ie stop line) before the light turns red you cannot be ticketed. Other states require that you are completely through the intersection.
I know in Northern Virginia they have done away with most red light cameras as they were causing more accidents as people would slam on their brakes to avoid going through the light and then get rear ended.
I think most of that sort of thing is (over here anyway) is a timing issue, combined with the law.
Our lights will change from green to amber, giving you 3-5 seconds (depending on the size of the intersection and the speed zone) to stop before it turns red.
Since they keep telling us that a typical reaction time is towards 1.5 seconds this gives us only 1.5 to 3.5 seconds to stop. In the wet this is pretty near maximum braking for some intersections on a bike (on a bus route). Sometimes dopey people who don't know the rules are waiting to turn right and panic at the sight of the light turning amber and will try to drive across in front of you. Not the fault of the law. These people need to be properly educated or if they are unable to learn must be shown how and where to buy a bus pass or train ticket. Harsh? I don't think so.
They need to make it so you have time to check your mirrors and stop safely without jamming on the picks.
If this is not possible then the law/road design has failed and needs to be changed.
If this is possible and people still break the law then they need to be discouraged.
I think the cameras for red lights if used correctly are a good way of doing this in a working situation.
I think speed cameras that make you look down at your speedo when approaching an area where people change lanes and direction and the road situation (in the form of traffic lights) changes constantly is a criminally stupid thing to do and the money grabbing mongrel that came up with the idea ought to be taken to the pub and put in stocks on a national tour for some good old fashions pelting with vegies.
That 1.5-3.5 seconds that you have to stop was just reduced by the .5 seconds that you took to make sure you weren't going to boost your contribution to the Gov't kitty by paying a speeding fine.
Your rules in the states and elsewhere seem somewhat different to ours and it would be unfair of me to comment. If you think the way it is set up sucks then you should try writing some letters to the responsible people with ideas, suggestions or complaints.
Cheers
Mike