answer:It may be necessary, at this point, since weapon and ammunition regulation only makes it a bit more difficult for someone planning to break the law anyway to obtain a firearm. But once a determined gunman takes out the armed guard – who would likely be uniformed and stationed near the main entrance, and therefore an obvious target – what good would they serve? Besides, it places yet another financial burden on the taxpayers to have to pay several additional armed officers. They would have to be present at all extra-curricular event, as well, I’d imagine. It’s a tough call.