They could have gotten the idea from an active shooter drill at school. We homeschool our kids, but our kindergartener goes to the local elementary school for speech therapy. Last year during her half hour session there was an active shooter drill. She, along with her speech therapist and a couple other preschool speech students hid behind a bookshelf in the library, lights turned off and they practiced being absolutely silent.
I was a bit disturbed when I picked her up. Sad that its necessary.
I’d be disturbed as well.
This is yet another reason why you homeschool, huh?