Russell, I don't think that necessarily specifies a 'cheap trick'. If you start with a rock on the "don't let the AI out" button, then the AI needs to start by convincing the gatekeeper to take the rock off the button. "This game has serious consequences and so you should really play rather than just saying 'no' repeatedly" seems to be a move in that direction that keeps with the spirit of the protocol, and is close to Silas's suggestion.