I was actually shocked by this on one charity ride. We had come up on a light at a potentially busy intersection, near the end of the ride. There were probably 5 ot 6 of us stopped and waiting for the green light, when two others just zoomed right by us and went through the red light. (I say zoomed because we were standing still; we caught up to them quickly and, if I remember right, my friend gave them an ear-full) Up to that point I had never seen someone just out and out run a red light unescorted.

I'm guilty of taking rolling stops through rural stop signs, but not before I look and check to see that I'm not about to get squished like a bug. I would never dream of running a red light.