We are a few days away from celebrating with our children, grand children, nephews and nieces a magical rabbit that travels the world dispensing chocolate. So you will forgive me if I take your forthright desire to celebrate honesty with a grain of salt. Everyone lies. All the time. And to suggest that the importance and integrity of this game is some kind of line that can't be crossed is ludicrous.
Maybe my point was too subtle, so I'll ask it directly and to the point. If your child makes up a story at school, specifically about how well he achieved in some game or competition, and is then told by other kids that he "has no morals", "has no worth", "does not count", "is a cheater", "is dirtying up the school", you would be okay with that because he was lying and deserves what ever he gets?!
I will repeat myself that no-one has the right to talk badly about anyone. You think you have the right to say what you please? Understand that I have the right to respond to you as well.