Iris and I have discussed something like this over the years. We both are of the opinion that all 4 wheel vehicle drivers should have to take a motorcycle course so they can "see" the situations that bikers are forced to endure. I suspect Jerry it was partly due to your motorcycle awareness that you were able to analyze the situation and resolve it without either the guy on the motorcycle or Mr. BMW knowing what just happened. It was kind of one of those pay it forward moments.
No course ,just make them ride for 1 year before being able to drve a car. This would open waaaaaay more eyes than a saftey course.