I’m also going to repeat:

There are a bunch of folks that are very excited by the social engineering opportunities of having children spend their day in a prison-like environment, subject to arbitary violation of privacy* by a micro-state of armed security and/or amateur security in the form of armed staff.

_{* and…let’s face it…subject to investigation for thought-crime, because the mythology of who will be a shooter is rich with werewolf-finding trivial details.}