I'm a dick to people when I'm in the car when I catch them camping in the left. I pass on the right, then I get in front of them and let off the gas, engine/friction slowing (no brake check) until they get so frustrated that they try to pass on the right, then I stomp the "go" pedal when they get in the correct lane. When I'm on the bike, I just sit behind them and keep waving them to the right, mouthing "get the f*ck over". If they don't get the hint, and I run out of patience: I have been known to pass on the left shoulder, even when the right lane was open, to make my point.