Yep, I know - but then they weren't in my shoes that day.
To simplify a long story:
I was in my car alone in a deserted area. There was a vehicle in front of me which kept stopping and starting - looked like two crack heads in the front seat, who kept hanging out the window yelling at me, slowing down to ten MPH, not letting me pass them, etc. Finally they just stopped in the middle of the road and both of them got out of the vehicle and started toward my vehicle. Honestly, they both looked completely insane, and they were yelling and laughing as they loped toward me.
All I did was pick up my handgun from the seat beside me and hold it up so they could see it. They stopped in their tracks, and one said to the other, "****, let's get out of here." They retreated, got back into their vehicle, and sped off.
I felt pretty powerful at that point, and I didn't even have to fire a shot. But I can ASSURE you - I would have if necessary, and I guess they realized that.