This is a simple, "boxing someone in" tactic used by road rage provocateurs. I do it all the time. Someone is on my a$$, and it makes me mad. So I pull up to a car going slow, and I stay there for 20 miles. The person behind me is going insane!! And I am chuckling all the way.
You have serious passive-aggressive issues. You should get help.
I hope no one takes a shot at you out there. There are a lot of nutcases.
You will chuckle right up to the point where the person you piss off is a gang banger on a short fuse -- who will put a bullet in you as he finally passes.
It is never a good idea to piss off people of unknown temper and armament. Particularly not on a frequent basis. Your luck WILL eventually run out
Back when I was much younger and shorter-tempered, I had a guy like you piss me off when I was already in a bad mood. I ran him off into the grass median