Batter Interference - OBR

[Saltydog]

Sometimes kids in the minors do the darndest things, so I try to get the answer before they do it. So, you have both a 'what if' and a 'I don't get it';

A. R1 attempts steal of SB. F2 launches ball to center field. R1 is now headed for home.
At what point does the batter (who has a great place to watch the game from:-)have to vacate the batter's box to avoid an interference call at home (assuming the ball has now found it's way in that direction)? And would the interference be based on 7.09(e)? Does number of outs matter?

B. What is the significance of 'before two outs and runner on third' in 7.09(d)? That is; how would it be different if there were two outs? Isn't the infraction at the plate the same event?

thanks,
SD