...lots of stuff to think about here. When the SWAT team arrives you don't want to be the "teacher" in civilian clothes running around the campus with a gun in ya hand. Then if you are armed and have on a uniform, anyone coming into the school to do harm can find you and do you first.
Liberals are like a "Slinky". Totally useless, but somehow ya can't help but smile when you see one tumble down a flight of stairs!