Adding to this: some towns will have laws that allow bicycle riding on sidewalks provided they travel no faster than jogging speed. So you can "become a pedestrian" without even getting off the bike. At some of the more problematic "smart" lights, cyclists simply slow down and use the crosswalk, then back into the road.
That said, ones that run red lights while in the road annoy me. It usually means I have to pass the same cyclist *twice*, since they will have passed me at the red light.