Should a college Librarian live on campus? Why or why not.?

I am an academic librarian and can think of pros and cons for the type of situation you describe. Pros: The librarian would be available to students where they do a lot of studying and writing. The librarian would get to know students in a personal way so they might feel more inclined to seek his/her help. Cons: It would be hard for the librarian to have boundaries between work time and personal time since he/she would basically be "living above the shop." The librarian could well expect to be asked for help at all hours of the day or night. It might be hard to convince a spouse to move into student housing. Would the librarian be comfortable bringing dates, friends or family to visit when living in student housing?

I lived four blocks from the public library where I worked once. House got broken into once, library once, car once. Had to miss out on New Year's Eve party because bozos next door kept tripping fire alarm at the library and they kept calling me to guard the place. Restaurants within walking distance of libraries and universities are notoriously bad. I moved after five months because I was willing to eat the last month of the six month lease.

Several of us live between one and six miles away from where I work now, and that's close enough, thank you.

no. First off, they would have to pay income tax on the value of the housing provided. Second, they would be subjected to all hours interruptions by students who could not be bothered to get to the library during normal operating hours.