I actually have no issue with schools having metal detectors installed at all entry points. That being said, are we really convinced that this will stop mass shootings? If anything, sick fucks who commit mass shootings will just choose an easier target, i.e. a mall. Then what? Metal detectors in malls?
If you're frightened of dying, and you're holding on, you'll see devils tearing your life away. But if you've made your peace, then the devils are really angels, freeing you from the Earth.