Oakleaf, I was faced with blatant disregard of red lights on my old commute. It was 6:15 AM, so not a lot of traffic. The first situation required stopping at a residential street that crosses a busy state highway. There is also a left turn arrow, for traffic on the highway. There's a detector thing, but it doesn't get triggered by my bike. I would wait for another car to come, but the first time, I didn't make it across the highway before the light turned yellow. So, from then on, I started across when I saw the traffic on the highway get the yellow and I clearly saw no cars coming. The second one is a T intersection that's on a little uphill, where I had to turn left. I have trouble navigating these for whatever reasons. Again, my bike doesn't trigger the sensor, but there was more traffic here. If no cars were coming, I went through the red. Sometimes my boss would pass me on her way to work, but thankfully, she never saw this...
I would never blatantly blow a light or stop sign. I have seen this plenty of times. Once my dh did it and I told him I would never ride with him again! It worked.