DAVE KOPEL: Guns on university campuses: The Colorado experience. “The experience on Colorado campuses since 2003, and at the University of Colorado since 2012, shows that adult students or professors who are permitted by their local Sheriff to carry a concealed handgun for lawful protection do not perpetrate unlawful aggression. . . . Colleges should respect the rights of responsible persons, such as Amanda Collins, to protect themselves. As the Sheriffs told the Colorado Supreme Court, law-abiding adults who have been licensed to carry guns throughout the state, should retain their self-defense rights when they attend or teach at a public institution of higher education.” I agree.