Not linking the addicting info article because I'm on a phone and don't feel like fisking it or correcting its lies. But I will touch on a few things.
One, I'm adding a class called, "when you're not shooting" to my repertoire. I don't care how many gunfights someone (or the character they play) gets into. The vast majority of an armed person's time is spent just like everyone else's: standing up, sitting down, walking around, having lunch, taking a shit, what have you. And a lot of programs put so much emphasis on the firing line that they have no time for, "take a shit without a negligent discharge."
Which is in fact what happened the last time I heard of an armed teacher having an ND. She removed her weapon in an appendix holster, took a shit, put her skirt back on, tried to slip the holster back into the skirt, and ND'd. It's a needed part of training.
Second, people complaining the campus wasn't shut down and an alert given. Those are for active shooter incidents, not ND's. All that was needed was an ambulance for professor numbnuts, not a lock down.