Em, 12 gauge pump shotgun if they don't listen ...

Just kidding ...

Flying over the runway is forbidden (yea, right) unless it's a special event. Our club rules strongly advise that all fly byes, slow approaches over the runway, landings, touch-n-goes are announced and acknowledged by all pilots on the flight line (raising of radios or verbal). Only announcement that trumps everything else is "DEAD STICK!".