There are states that have addressed this issue in a statutory fashion.
Colorado has a REQUIREMENT that you stay in the right lane unless you are actively passing someone. If you’re loafing in the left lane you can get ticketed for it.
Many states are trying to deal with the passive-aggressive wankers by adopting more German like rules.
I wonder whether anyone has ever tried the defense of "I was actaully speeding...did the patrolman who cited me really want me to go faster?"