Auto Log Off Timer for chat room

The main chat room here needs a 30-minute auto log-off timer to help keep the room managed. Almost every website on the internet has auto log-off timers for inactivity. Most websites are just 5 or 10 minutes and they log you off so 30 minutes is more than enough time. If you haven't made a keystroke activity for 30 minutes then you should get let out of the room.