Of course the flip side to this is that sometimes cyclists have to run red lights... as the lights are not set up to trigger for the cyclist.

Now of course the motorists may not understand this, but just happen to see you running what appears to be a solid red light... and take it in a negative way... "those darn cyclists."

I know recently I was very close to going on a left stale red, when a car pulled up behind me... knowing he could trigger the light, I motioned him forward... only to have the motorist then try to drive past me... DOH!