Just a thought. Given that some, if not the majority of shooters wear "ninja" or "men in black" or tactical gear do those who do not commit suicide. Is this an attempt to confuse and lessen their chances of being shot by the police or others who respond?

Personally I do find the idea of arming school teachers - well different. Mindful that a good number IIRC of children each year misuse parental guns and kill others or wound themselves, what will happen when a child at school finds a teachers gun?