Where I live, at least four cars roll through every red light, everybody drives above the speed limit whenever they can, and unless there’s a backup, most people merely slow down at a stop sign. I’m guilty of these things, but unlike a lot of my fellow drivers, I don’t think of a bike lane as a place to park my car or drive whenever it suits me.
Yes, a lot of people who drive 20-pound bicycles could do a better job with the rules of the road. But so could the vast majority of people who drive two-ton cars, including the SUV that rear-ended my bike on an otherwise empty street last summer. (I managed not to fall, and no harm done, so I was far luckier than most cyclists who get hit by cars.) So who’s the bigger danger?