Road Bully

I have seen people flicker their high beams on the highway to get the car in front of them to move out of the way. I think it's extremely unnecessary and can be a little scary if you're on the receiving end of this prank. You don't know whats going on and you're minding your business when all of a sudden you're afraid there's a crazy person in the car behind you that is about to run you off the road. Well it happened to me this evening. Only I was in the slow lane of a 3 lane highway and there was no one blocking the other 2 lanes. At first I thought maybe my lights weren't on and they were trying to be considerate. My lights were on. When the driver behind me finally passed me after 10 minutes of stress, they didn't even speed past me in a last effort to intimidate me. They slowly drove off like nothing happened. I still don't know what the hell happened. Is Road Rage out and Road Bullying in?