What this is actually about is wasteful, feelgood expenditures that are, statistically, unlikely to have any relevance on those students lives. Spending that time and money on actions elsewhere could, in contrast, have measureable immpacts on the lives of children. If you think this is prudent then you are ignoring the facts of the matter and reacting soley on the basis of emotion and fear
This entirely, yet it does not go nearly far enough. Here are 2 considerations:
1. The worst thing you can do for a person who is at risk of mass violence is to make them feel more justified as dangerous and different and unwanted members of society.
2. Security theater has short-term palliation of that fear you mention, but in the long-term merely contributes to setting of a new normal. First it was security officers, then metal detectors, then armed officers, active shooter drills, assault rifles, etc. Each time some of us say the action is bad, yet we give up that fight shortly after it has become status quo. Sooner or later we are going to be frisking kids as if we've always done it.
And yet we will have done nothing to actually prevent these scenarios, and likely we will have promoted their occurrence in our attempts.
Seriously. The numbers of incidents and fatalities are going up. Shouldn't we be asking why?