The documented cases in which red-light violations were thrown out in court involve cameras that were not coordinated properly with the traffic signal (i.e., the camera was snapping pictures while the light was still yellow). I'll say it again -- no engineer who reduces a yellow interval below its accepted standard (given the speed and design considerations I mentioned) shuldn't even be permitted to practice as a licensed engineer.
If a municipality has reduced the yellow interval at an intersection, you have to show that it is "substandard" before you can claim that it is "unsafe." If an intersection is designed in such a way that the optimal yellow interval is 3.4 seconds, and the existing signal is operating with a 4-second yellow phase, it would be perfectly acceptable for the municipality to reduce the yellow phase to 3.4 seconds.
You have to remember that a traffic signal is a safety device, but it must operate in a manner that maximizes roadway capacity. I could design a signal with 10-second yellow phases at an intersection that only requires 3-second phases, but then we'd be sitting here talking about how idiotic those long yellow phases are.
BTW, my understanding is that Mr. Armey has not been heard from on this topic since his report was released. Anyone who knows him or a member of his staff is welcome to bring my offer to him -- I'd love to have the national exposure, but only if he's got a legitimate gripe.