Would you call a slapper out 4 times in a game for stepping out of the box if she did it in all 4 of her at bats?At the end of the day, I think what we're collectively saying is we want to shut down the illegal pitchers but the only way to do that is to have the umpire call IP after IP after IP after IP until the pitcher has to leave the game.
I'm not sure that's ever happened in the history of the game and I'm not willing to be the first one to do it!