The drills don't make sense to me. If it's a drill to protect the students against one of their own, that student has also been in the drills and knows that quiet rooms still likely have people in them.

If I remember correctly, the last school shooting had the kid shooting through a door's window into a classroom and killing people who were hiding in the corner. Obviously he knew they were in there already. The drilling he was in would've showed him that.

So what is the point of it? You are giving away any and all secrets to the potential assailant. It's nothing like a fire drill or a "mother nature" type of drill. They should really just stop doing it.