Just wait and see how many times teachers would pull guns on students for fighting in class, not listening to them, or other dumb shit that isn't a REAL issue like a mass shooting.
We have almost a half a million conceal carry permits in the state of Wisconsin, since they passed the law in 2011. Not a single one of them has ever shot someone involved in a fight that they weren't involved in, or been arrested for committing a crime with their weapon.
What makes you think a legal carry permit holder would do something like that? You seem to be unable to differentiate between a trained law-abiding citizen with a firearm, and an armed criminal.