&gt; How ridiculous is it that we protect cash so well but we don&#x27;t think kids should be protected?<p>You&#x27;ve touched on one of the problems with that argument, but the rest are even easier to address. Money is more easily corralled (it doesn&#x27;t need to have daily recess). When banks are targeted, the goal is to leave with a bunch of cash; when children are targeted, the goal is to cause as much shock as possible. Banks have a much longer history of robberies (a la wild west and earlier), that stimulated them to have security guards. Those guards are a cost that hasn&#x27;t historically been necessary for schools.