And with that logic
And following that logic further, if you heighten security at all schools do a shooter can’t enter and slaughter the children, they will shift to shooting them as they exit at the end of the day.
You could then buy up all the homes around the schools so you could have a large perimeter around the school with armed guards searching each parents car before letting them through the fortified gates. Then everyone’s safe, right?
Wrong. Then the massacres will shift to playgrounds, or shopping malls, or movie theaters as people exit.
You can’t stop crazy if crazy has access to assault rifles. All you can do is shift their targets to something easier. And their will ALWAYS be something easier.