All elevator riders are required to travel a minimum of 2 floors. Ex. If you are on the first floor and you press the button for the second floor, all other passengers are entitled to give you the evil eye for the duration of the ride.
I know this all too well living on the third floor of a dorm building that only had three floors, that had an elevator. Nothing peeved me more than having to stop two times because some lazy bastards couldn't take the effing stairs. I stopped using the elevator there because of this.