I got nailed with one of these things in January in downtown Tempe. They didn't get me for running a red light, but for speeding. I was going 46 in a 35. I don't drive there very often, and it was at night, so I wasn't paying attention. I went to the driving school for a day instead of paying the fine.
I guess I don't really have a problem with it. If you're speeding, you're speeding. But they are using them as a money maker, not for safety purposes. They are going up everywhere. Now they are going to have them on the highways throughout Arizona (not just on the 101 through Scottsdale).
To me, the highways can suppost much higher speeds than 55-65 miles per hour. The speed limits should be more like 75-85.