Well your always going to get alot of rants on this topic.
I would like to tell you that I have personally seen someone die horribly, from the same actions you took.
It's a gray area, it's hard to say who's fault with 100% certainty, but the guy that died in my mind was innocent of any mal-intention. The guy that did what you did, was guilty, and exacted his own justice, as a result several people were injurted, 100's of thousands of dollars of property was damaged, and a human life was taken.
A guy driving a late model camaro was going fast, really fast, tripple speed fast in some spurts on a local freeway. The road, his car, and him the driver were all very capable of the speeds he was traveling. None the less it was illegal, and he was in the wrong for going this fast.
So here is the complication, some guy like you, was having a bad day, looked in the rear view mirror, and saw that the other driver had basically committed to passing through traffic in a particular lane, since it was the only available window through traffic on a 4 lane highway, it was obvious where he was going to go even if he wasn't already in that lane.
The camaro driver carried on in that lane at high speed, and you could see him coming for a long long distance back on a straight stretch of road.
The f!@# A@!#$ decided, hey, I'm going to teach this guy a lesson for driving fast, he pulled in front of the guy when it was far far too late.
There is no man made machine that could have stopped or even slowed down to less than lethal impact speeds.
WHO put them in this situation by his own will? Yes, the man who decided he was going to teach everyone a less that day. He literally caused an accident that never would have happened that day, on that stretch of road, at that very instant.
He waited until the man had no were else to go, and cut off his window, he had already commited beyond the point of return, and because of this jerk, an accident was not avoidable.
The man did as best he could to avoid the car that swerved in front of him, the guy actually missed several cars and hit the wall on purpose to miss them, his car then flipped over, and landed on HIM!!! (T-tops) the car then proceded to sit on top of this poor guy, and drag him down the freeway for over 1500 ft.
Basically this guy was the worlds biggest grease stain on the freeway, being ground down to nothing by his car as it crushed him down the paved freeway; because some asshole decided he could play judge jury and executioner, and in one swift moved he caused alot of harm to alot of people.
If that was my son that died, I would have beat that instigators ass to a bloody pulp with my bare hands.
I don't give a shit if he was driving fast, there is no excuse for the malicous actions captain speed enforcement took, and he is at fault. The sad thing is that he gets to live the rest of his sad pathetic days, while his lunacy ended the life of another.
I may tell another story about my pet peaves on the E-way, but that's enough for my blood pressure for now :(