P.S. I've personally avoided hitting someone on a bike only because they had a front reflector. The idiot was riding at night with no lights, I went to pull out in my car, and only the fact that my tail lights lit up the reflector on the front of his bike caused me to see him in my side mirror, and not pull my car out right into the side of him.
There's no doubt a front light would have been FAR superior, but a front reflector was better than nothing at all.