Some States must have different laws about staying right and passing on the left. We get lots of out of State drivers down here and whenever you see an Indiana or Ohio tag the guy will be cruising along in the fast lane and won't get over for anyone.
I used to pass them on the right and then cut back in a little close to give them a hint, but I've sort of mellowed these days and don't get all that flustered about it.
I was always taught to stay right, pass left, and then get right back over to the right when you were clear. I guess not everyone was taught that. My ex-wife used to drive me nuts because she would cruise along in the left lane and not move over. We had more than one argument about that one.
Another pet peeve is people who don't turn on their lights when almost dark or dark. It's amazing how many cars you see with no lights and it is pitch black. Don't they notice that their dash lights are out?
Don