Active shooter training is what happens when you try to make active shooting situations happen never again, and yet people stand in your way such that they keep happening over and over and over again, year after year, decade after decade. Columbine was 1999. And it's not just standing in the way such that we do a little bit at a time and act cautiously and conservatively in implementing changes to preserve everyone's rights, but standing in a way such that absolutely any action whatsoever is impermissible.

At some point if your goal is to protect children who are subject to active shooter situations (which in fact do happen), then perhaps training people to make the best of them when they inevitably occur is all we can do, given the political climate. When a school full of first graders turns up shot dead and literally nothing is done, maybe active shooter training doesn't seem like a bad idea. This massive over-response is a reaction to the preceding massive under-response.

If you really don't want active shooter training to be a thing, make active shooters a thing of the past. Other places don't have this problem. If you want to make a change, call your congress people, and don't vote for them if they won't support sane gun measures, even if they're from a party you typically vote for.