This must have started out in the Onion. Either that or the Superintendent is an idiot. First of all, kids will use those stones against each other long before they will use them against a shooter. When my son was in H.S. he could have used the stones effectively as a 6'5'' left handed pitcher, IF he could have gotten to the stones before a bullet found him. 99% of the kids couldn't hit a shooter to begin with.