These things drive me nuts. The world is decaying and you can't jus blame it on the a school systems. Yes kids have sex ed, but guess what parents! Step up and don't sign the consent. Get a grip and take th control that you have. Parents ALWAYS have to consent to those programs. And guess what! We live in a country where crazy things like a school shootings occur. God forbid your child be the one killed because you raged over them being involved in a drill. It's called preparation people, not indoctrination. Would you not discuss with your child other safety procedures simply because they're young?
Sometimes people go overboard but it's fear based and unfortunately in many cases its to protect the employees. Too my ignorant people are suing schools for doing less restrictive things for discipline, so now we've changed approaches.
I am a teacher. I have run those drills. I have followed some of those procedures, and I can tell you one thing. If a child was becoming excessively violent its better for students to see a child be restrained than a teacher get hurt.