You know, all I really want (assuming that I'm not going to get the world to start driving more safely) is for people to admit they were wrong and to drive away with the intention to try a little harder next time.
I keep being disappointed by people who do something foolish and dangerous, and then look at you like they (a) have no idea why you are staring them down, or (b) give you a sort of "eff you" look. To admit error, to be embarassed by one's own mistake seems to have weaned out of society. Men and woman both seem to approach driving as a competition to be won at any cost.
When you nearly run me off the road, just look horrified, mouth "I'm sorry" and drive sheepishly away. Give me just that, and I'll stop wishing for your death in a firey crash. (Or like the woman on MadTV this past Saturday, follow you onto a mountain road and force your car off a cliff.)