If you think about this with a sane mind for a moment, it's really not a big deal.

All of those things listed ARE possible "trigger areas" for recognizing someone who can carry out harmful actions towards themselves and others. What's so bad about trying to protect against that?

I have taken Security Officer training as well and both in the past and today, no training says to go house to house breaking doors looking for this stuff and blindly punishing the people inside without knowing their mindset/sanity. It's just things to watch out for, to keep on your toes when around it. That's all.