“ John, it’s too noisy over here, and some people are trying to study. If you continue to be disruptive, I will need to ask you to leave. You can choose to lower the volume level and stay or you can choose to leave.
Mary, your computer time is up, we have someone waiting. If you continue to violate the time limit, I will have to suspend your computer privileges. You can choose to log off now and get more time tomorrow, or lose your computer access for 2 days.”