I understand why people feel this way. This is how I generally try to explain my attitude to people like yourself who seem more interested in the actual answer to the question rather than just using it as a way to excuse shitty driving.
I grew up in a hunting family. I've been handling guns since I was twelve, and I've been getting instruction on safe gun handling since well before that.
At every step of the way, I was told that safe gun handling is something that must be made into a habit. It is not enough to think, "Oh, I'm holding a gun right now, I must make sure not to point it in the direction of any persons." Rather, I was expected to simply make it muscle memory to keep my muzzle pointed away from any persons, even if the weapon was unloaded, the action open, and the safety on. If someone moved in front of my muzzle, it became a habit for me to adjust the gun to compensate for their change in position.
When shooting, I was told that I must be absolutely certain of the target and everything that lay beyond the trajectory of my shot. This was also expected to be made into a habit, so that when "buck fever" took hold of me, I didn't have to think about the potential consequences of my shot or weigh any statistical risks or any of that jazz - it just became a natural part of lining up a shot to process, unconsciously, everything that lay beyond my target and to not take the shot if I couldn't be sure my bullet wouldn't do any harm to persons or property.
In many, many cases, waggling the muzzle of a gun towards a person is of no real consequence, because the gun is unloaded, and/or the action is open, and/or the safety is on, and/or your hand doesn't happen to slip such that your finger activates the trigger. Nonetheless, waggling the muzzle of a gun towards a person is a deeply irresponsible thing to do, not specifically because of the level of danger introduced by any given incident, but because it indicates that one lacks the sense of responsibility appropriate for handling that much lethal potential - that one has not spent the time, effort, and attention necessary to make safe handling of that lethal potential a habit.
When a driver crosses the limit line, whether or not they actually put any persons in danger with that action, they are displaying the same lack of sense of responsibility towards the lethal potential they are handling as an irresponsible handler of a gun - and considering cars kill more people than guns by a healthy margin, even counting suicides, it could be argued that their moral failure is even deeper. Stopping behind the limit line should simply be muscle memory. Habit. One should not be thinking, "Well this is a pretty empty intersection, so it doesn't really matter if I roll through this one." One should simply stop. Every single time.
This is why I get angry. I get angry because people treat machines that kill 40,000 people a year with the same level of concern that they treat their refrigerator. Because most drivers on the road casually break the speed limit, casually roll through stop signs and rights on red, casually park in bike lanes, and a long litany of other irresponsible behavior that I see every day, all day long. The chances of any given incident of such behavior leading to actual injury or death is low, but the aggregate failure of the driving population to treat their cars like the deadly machines that they are kills a hundred people a day in the U.S.
If people behaved so unsafely with a gun, absolutely no one would think I was overly aggressive in yelling at them. They would think, "How dare that irresponsible fuck behave like that with such a deadly machine. Good on that guy for giving him the business." There is no moral difference between a gun and a car vis a vis safe handling - the only differences between the two are a) the function they play in most people's lives and b) their level of commonplaceness in our everyday lives.
This is why I frequently talk about the "culture of car violence" - we are so used to the presence of cars in our lives, and so used to handling their lethal potential, that it erases from our mind the fact that we're in control of machines that kill. We get lazy. We think of unsafe behavior as something "everyone does," and in our minds, that excuses our unsafe behavior. We have been encouraged in this by the intervention of corporate interests - for example, the successful effort by car manufacturers to coin the term "jaywalker" and to put the presumption of blame for a pedestrian-motorist collision on the pedestrian.
We need to shake people out of that mentality. We need to fight back against the culture of car violence. We need to start making a big fuss about people not treating the driving of cars with the respect, attention, and effort the activity deserves.
Bookmarks