Gregory's ServerI was on a highway here recently where a guy was being dangerously aggressive. I pulled over to call the police and let him go ahead - but you have to be careful stopping when you are dealing with someone like that.
Anyway, just as I was about to turn off the highway about 20 minutes later, I saw the police had him pulled over.
Call them in. Get a dash cam. They endanger everyone on the road. Let their insurance companies deal with them.