schools, universities & training courses...
I was discussing these issues(mental health, firearms-weapons, school violence, etc) with my ex-girlfriend. She was on the faculty of a large university in TX and taught music in other places. She expressed concern with the administration & state regulations not really protecting the teachers or professors in some areas.
I'd sent her a media article & recorded video of a college student becoming violent/aggressive in class. This was about 2 years ago too(pre-Sandy Hook & VA-Tech).
These places need to screen or enforce rules better to prevent spree shootings or outbursts. Many of these colleges/schools don't want any complaints or lawsuits.