Batter and runners shall be placed where in the umpire's judgment they would have been had the interference not occurred. No interference shall be allowed when a fielder reaches over a fence, railing, rope or into a stand to catch a ball. He does so at his own risk. However, should a spectator reach out on the playing field side of such fence, railing or rope, and plainly prevent the fielder from catching the ball, then the batsman should be called out for the spectator's interference. Spectator clearly interferes with the outfielder attempting to catch the fly ball.
Umpire calls the batter out for spectator interference.
Ball is dead at the time of the call. Umpire decides that because of the distance the ball was hit, the runner on third base would have scored after the catch if the fielder had caught the ball which was interfered with, therefore, the runner is permitted to score. This might not be the case if such fly ball was interfered with a short distance from home plate. 3.17 Players and substitutes of both teams shall confine themselves to their team's benches unless actually participating in the play or preparing to enter the game, or coaching at first or third base. No one except players, substitutes, managers, coaches, trainers and bat boys shall occupy a bench during a game.