Kind of like the big rig I noticed one day that had "SLOWER TRAFFIC KEEP RIGHT" mirrored on the front grill in lights... I bet some people still don't do it though when he's bearing down on their ass...
I noticed in Texas there are people that insist on doing 55 mph in the fast lane, even though there is a law now that says you must keep right except to pass (not get passed on the right!!!)