My dog would want to be best friends with the idiot. Tail wagging and super happy. Golden Retrievers do not make good bad as$ guard dogs.
If someone flies by me or cuts me off, I try to remember that they may be late for a job interview, plane, train, have a sick kid in the car going to the hospital or something else much more important than my mundane life that could cause them to drive that way. I'll even say a prayer that they get where they are going safely. Most days.
I personally prefer to perform a PIT maneuver on them. J/K, in spite of the fact that that's exactly what I WANT to do!
If you try to let them go on down the road, they won't, and they keep following you, head for the nearest police station. They will probably take the hint and leave.