Tank, wasn't it San Diego that had to shut down their red light camera program for a while, because the yellows were shortened?
Here is an interesting article:
San Diego Red Light Camera Program
Another interesting story:
See Red (How Yellow Times Affect Tickets)
I remember reading in the LA Times that Los Angeles is making $3 million a year from red light cameras, and that removing them would be "too much of a financial burden". Of course, you can't always trust what you read in the LA Times.
If this issue was about safety, then I think every stoplight with a camera should be required to have a count down timer, so drivers know exactly when it is going to turn red. They already have them for pedestrians, so we know it can be done. In fact, why not have this on all intersections?
Better yet, forget the cameras, and just lengthen the yellow at dangerous intersections. Studies have shown this reduces red light running.