From OBR:
7.09(d) It is interference by a batter or a runner when before two are out and a runner on third base, the batter hinders a fielder in making a play at home base; the runner is out.
From JEA:
No outs. Runner on third. The runner attempts to score on a passed ball. The pitcher covers the plate as the catcher fires the ball to him. The batter who is still standing in the right-handed batter's box is struck with the throw thus preventing the pitcher from making the play. Is this interference?
RULING: With less than 2 outs, the runner is out for the batter's interference. In this case, his remaining in the box did interfere with the play. In some situations, the batter's staying in the box may not actually interfere. This requires umpire judgment on each play.
Seems pretty cut and dry to me.
Provided a fielder had come to the plate area to receive the throw, call out the runner attempting to score for the interference of the batter (runner) during the play at home plate. He should have been long gone anyway. If no fielder came to receive the throw, then the batter didn't really interfere with anything, did he???
Just my opinion,
Freix