It is to be noted that University of Colorado (Boulder) is the state institution that banned guns.
Colorado State University (Ft. Collins) decided not to resist about 10 years ago. CCW by properly permitted students and faculty has not resulted in daily massacres as the CU folks were sure would happen.
Evidence and experience seems to not count for the antis.
Oh, and don't forget that the City of Boulder banned nuclear weapons back in the '70's (except for governments, of course). Silly people.