Me, a little bit. I was on my BMX, which means A) Highly manueverable and B) I can bail out very quickly.
I was waiting for the light to change. As it did, lady coming the other way decided the lights didn't apply to her, so I decided to put it to the test and started moving on green, forcing her to get the brakes, getting caught in the middle of the intersection. (She wasn't going all that fast, so I wasn't taking any huge risks).
90% of the traffic across that intersection is cyclists and pedestrians and I often see cars ignoring the red lights, if there's no cars crossing.