We of course should prepare and have protocols to protect children in these scenarios, but there are better and worse ways to go about it. I essentially believe it's okay to leave young children blissfully ignorant of low probability / high impact harms (there are many that are equally likely to school shootings that we ignore). Lockdown protocols and training seem fine to me, if they are sufficiently abstract, but there is an emerging trend of "crisis simulations" which involve people posing as shooters, simulating gunfire sounds, and staff / students posing as shooting victims, etc. I think adults can handle this kind of realism, but there is evidence for harm in young children.
Fair point and I agree with you 100%. I wasn't aware that people are this bonkers.
I haven't followed this issue super closely, and based my previous statements on our experience - I have school-aged children and our lockdown drills are not anything like this and are very child focused. It's really about understanding what the staff and children need to do.
https://www.nejm.org/doi/full/10.1056/NEJMp2301804