Stop it! No, just stop it!From Volokh:
What Exactly Is the Reason Not To Allow Professors To Carry Guns?
We'll, let's see.
In all my encounters with nutty students (there have been a few), not having one has never been a problem. Walking onto a college or university campus, I am in one of the safest environments in America.
Besides, no one should feel that there is a physical manifestation of whatever repression he or she may believe is affecting them.