Fellow Massachusetts drivers, I would like to call your attention to Massachusetts G.L. c.89, §4B. Violation of this law occurs when the driver, “while operating a vehicle on a way, did fail to drive in the lane nearest the right side of the way when such lane was available for travel, the defendant not then overtaking another vehicle or preparing for a left turn.”
In other words, a law exists specifically to preclude people from just hanging out in the left lane on highways. Sadly, it carries only a $100 fine, not mandatory imprisonment.