I would not of stopped, I would of drove around until he got bored. If he was driving dangerously, I would of drove to the police station. However, one time I passed a guy and I guess he was upset, he followed me home at a distance where I did not really notice he was 'following me'. He pulled into my driveway and got out of the car with a small bat yelling. I drew down on him with my pistol. That solved the problem as I asked him to please get in his car and leave my property.
He did call the police afterward and they stopped by. I explained the situation, they left and I never heard a thing again.
I've often thought about what I would of done had he not left. A very odd situation. I think he was posturing and not trying to hurt me, so shooting him was morally wrong, even if legally right. I'm glad he left.