I drove for a living and have witnessed this behavior for decades. It seem the moment a good well manner person gets behind the wheel, they leave their manners at home. Here in the mountains, roads are usually 2 lane only with few passing places. People drive slow for what ever reason and have a mile of traffic backed up behind them. They are obviously not in a hurry, but will never pull over and let people by. Heard one talk in the local restaurant that he drove 92 miles at 20 mph because the road was snow packed. He did say he couldn't see the end of the line of cars behind him but ASSUMED they didn't care about driving 20 mph in a 65 mph zone. These same rude people pull into one of the few gas stations, get to the pump, then walk the dog, got to the bathroom, go shopping in the store, then gas up, then wash the windows, go buy gum they forgot to buy the first time, get some lottery tickets, wait for the kids to get out of the bathroom, buckle up, put on the sun glasses, remember they didn't empty the trash, unbuckle, empty the trash, rebuckle and slowly pull away from the pump, without the slightest guilt of making a dozen people wait on them.