[jtrv]

edit: okay I figured it out.

I don't see why anyone would trust this agreement. You can't get in trouble for violating it. I think if you do this you're asking to give the other team up to 40 points if you suddenly realize they didn't follow through. People aren't going to act in the benefit of the enemy team.

The question you have to ask yourself: Do I want to win?
If yes: don't follow through.
if no: then you should question why you are coming up with the mutual idea in the first place.