If I think that one or more players are engaged in secret diplomacy, but have no proof, can I do anything about it?
Specifically, if two players appear to be working together in a game without saying anything in the chat box (one player placed large armies, which protected another player's 1 army continent and did not attack the player, who held half the board but did not have enough armies to keep it) can I report these players for secret diplomacy? How concrete does proof need to be in order to report someone? Can I get in trouble for filing a false report? I would appreciate it if someone who knows more about this can fill me in.