A bad driver is perfectly safe until they meet another one

Things that are no longer remarkable, after a month of bicycle-commuting in San Francisco:

• High-speed red-light runners. It's so commonplace that whenever I'm waiting at a light, I wait another two or three seconds after it changes, expecting the large black SUV that'll blast through right about then. I'm rarely disappointed.
• Cyclists who anticipate the green light, and roll out into the intersection while the other direction is still yellow.

It's probably only a matter of time before a perfect storm of the above creates road hamburger right in front of my eyes. Mercifully, this hasn't happened yet.