Chat bot kill switch
Give room owners the ability to stop the bot by typing some key phrase. It should then either exit, or at the very least, be quite for a long time. This will allow room owners to limit the damage if a bug causes the bot to go crazy and the bot's owner is not available to take care of things.
For a phrase, pick something easy to remember, and don't require it to match too exactly. The kill switch shouldn't be too easy to hit, but it shouldn't be too hard, either. Perhaps something such as /\bstop +bot\b|\bbot +stop\b/