That same thing happened to my friend M in college. Back then - '89 - our school was probably not unusual in having a campus phone number scheme that was super

That same thing happened to my friend M in college. Back then - '89 - our school was probably not unusual in having a campus phone number scheme that was super predictable. The phone number in room X of building Y was 348-xxx1, say, and the next room on the hall was -xxx2, etc. So if you knew the building, and you knew which room someone lived in, you knew the number. Campus telecom never changed this up at ALL. Well, in the summer of '89 they built a new rec center, and it obviously got new numbers. And the number they put at the racquetball court reservation desk was one digit off from M's number. He got racquetball calls ALL THE TIME, but the ones that annoyed him were very early in the morning. He complained to Telecom, but they wouldn't help, so he did what your little old lady did: he started taking reservations -- and to make it worse, he gave out confirmation numbers. The rec center didn't have a confirmation number system. After about a week, the racquetball center got a new phone number. Which is hilarious and shows how stuck campus telecom was in their thinking, bc it would've been way simpler (you'd think, anyway) to give M and new number given how much printed matter had the racquetball number on it by then.