I don't disagree with the OP or any of the respondents, I just recognize the futility of a battle they can't win. Ultimate surrender to what you can't control is the key to surviving some of the incredible asshles who you'll encounter on the open road.
That being said, here's the reality: 99.999% of drivers are completely cool or we'd all be dead. Our lives are in their hands at all times. It's the .001% that can get you. But don't think you can fight them. If you're smart and lucky, you'll avoid contact and conflict with them. Your best defense is complete and utter avoidance. I have had this approach for a very long time. It has worked for a lot of miles. I have dealt with a lot of traffic. Just sharing what works. The rest is up to you.
Suffice it so say that getting all cranked up over this will only result in your demise, nobody else's.