I got out of school right before shootings became common enough to happen every week, but I could see the already present impulsive fears begin to morph. Before the shootings were that common, everyone in my hometown was afraid of secret Muslims and insurrectionary gay people suddenly conquering the place, then towards the end of high school the fear started transitioning to something more like "Muslim and gay students will commit school shootings." And it seemed like a genuine fear for some of the less connected to reality students. I know two former classmates who refer to themselves as survivors, despite a shooting or terrorist attack never occurring. All we had were drills and cops roaming around.