whether I run lights or not depends on the amount of cross traffic. If it's a light street with nobody waiting at the stop light to trigger the sensor, I will cross it. I personally don't believe people on non motorized vehicles or on foot going slower than traffic flow should have to stop at stoplights. If anything it would slow traffic down. If I was a car I'd rather the person just cross when they felt it was safe on a light street rather than triggering a red light for me to wait at. This is what I do thus. Basically, I use common sense.
On my road bike or on foot I have a wider field of vision, and able to more quickly anticipate and react to situations, and can in general cause little injury to anyone but myself, so basically I'm only putting myself at a calculated risk which I'm willing to take.