I know this isn't exactly a cycling issue, but I thought I'd bring it up since the ATA is getting loud about it.
If you feel you were caught unfairly, have you contested the tickets? I've heard that those photos are largely inadmissible in court, and that the whole system depends on people paying rather than inconvenience themselves by contesting the tickets. Don't know if that's totally true.
I DO support the cameras, because I see lots of people running red lights. It makes me feel safer knowing that the intersection near my house, at Damen and Division, has a red light cam.
Get another ticket tomorrow and use it as an opportunity to 1. contest it and 2. double check your math from last time.