In 7th century BC Assyrian's placed signage on the roads that read "Royal Road let no man decrease it under penalty of death and public impalement." Even that didn't solve the problem.
Any instance in which transportation conflicts result in creative expression and art - and not violence - should be celebrated. It's awesome to see STAS use their creative powers for good. This hat, and reel that inspired it, has brought more attention to common sense bike courtesy than the 15 Dismount signs in the Vail Village. I donated this hat to the Vail Town Council - they loved it.