You need to keep an eye on (censorship through conversation). I'm saying it again, and no one will convince me otherwise. IF a player goes into a treasure chest WITHOUT knowing what's inside, with 16 gold, and then it turns out that a +6 all stats teapot is hidden there, waiting for him, then I think it's QUITE POSSIBLE that he looked at the map editor. Because, simply put, people don't just go into treasure chests with 16 gold in other cases. If he did this in every game and took something, that's a different story. If he had already explored the treasure chest before, that's a different story. I'm talking about the case when HE DIDN'T KNOW what was in the treasure chest!
Have you ever killed all the computer players on a map?