Over my many years of riding I have "lost it" and chased down drivers, even had some punches thrown at me- i've never hit back- I'm good at blocking punches. But I'm not proud of those interactions. It really doesn't make the world a better place.
I still get buzzed, honked at and nearly clipped by cars at about the same rate as I always have but the verbal interactions have been greatly reduced over the years- I'd like to get them down to zero.
The last serious driver interaction I had I ended up calling the police. The guy almost sideswiped me with his van and I slapped the side of the van as he nearly took me down so he slammed on the brakes and came out at me screaming to not touch his vehicle! When he said if he ever saw me on that road again ( a route I frequently took to work) that he'd run me down I called the cops.
Unfortunately, there are some truly screwed up people in this world carrying a ton of anger just looking for an excuse to be violent. I'm sure there are bike riders who fall into that category as well as drivers but there are far more drivers and their vehicles can be used as a deadly weapon with ease.