This sounds pretty stupid if you ask me. If you want to have a "warning" system, ok... its your tourney. However, you are going to punish the offense because a pitcher rolled through one? The rule of thumb is that if all runners including the BR advance 1 base you disregard. So why don't you just use that thinking and then warn? So lets say no warning has been issued and a kid no stops.. you call a balk and the batter hits a double. Just leave the runner @ 2nd and tell the pitcher that is your warning. If I was a coach and that happened to my team, I would be watching the rest of the game with binoculars at the dorms!!