When the current Juniors were 8th and 9th grade, they went undefeated, and used the same QB draw play all season with Adams for short yardage and red zone/goal lines, and it never did get stopped for the entire season. Everyone knew what was coming, and it always worked. (Maybe 7th grade too, I forget.) The offense would get into that situation and the coaches would call the play simply by yelling "fire!" all the way across the field, every time. That's pretty much rubbing the competition's nose in it, when you announce the play and dare them to stop you.