Did you know that in several states, pretty much anyone can stroll into their 9 a.m. freshman economics class armed to the teeth?

In September 2016, professors at the University of Texas-Austin found empty bullet casings around campus along with menacing notes meant to mock anti-gun advocates, reading "Triggered?" and "In the land of the pigs, the butcher is king. Oink... Oink... Oink." That same month, at another Texas college, one student accidentally fired a gun in one of the dorms.

Not only are there questions about whether these campus carry laws actually work in the "the only thing that can stop a bad guy with a gun is a good guy with a gun" sense, but there's also an intellectual cost to life on campus where you never know when what started as a healthy debate could turn deadly.