Running Red Lights

I work very near the center of Salt Lake City, Utah. So the end of my commute entails passing through several urban intersections. The other day on my ride in I was approaching a corner where I turn right, and I had a green light. As I got closer another cyclist came straight through the intersection against the red. I turned, passed him, and then stopped at the next intersection because the light was red. The other cyclist came up next to me and we said hello, then as the traffic thinned but with the light still red he blew through and went his way. My bike parking area was mid-block after the light so that was the last of our interaction. But it left a bad taste in my mouth, and I wonder what I should have done. I can never think of the right thing to say in the spur of the moment.

I wanted to say, "You know, when you run a red light like that, not only are you breaking the law, and endangering your life, you are irritating motorists which endangers my life." I'm just not sure saying anything would have made a difference.