Edit: Never mind, I hear we have to post our decks...
Should it be "legal" to reveal other people's decks? I'm sure it would be fine to talk about them with your teammates, but to anyone else? I'm not so sure. Let's say person X plays person Y. Person X wins and will play person Z in the next round. The thing is, it's late in the game and person X is the last player on his team, and they don't have much more than 30 cards in their vault. Should person Y be allowed to tell person Z what deck he will likely be facing? I really don't think they should. That example is talking about the end of the war, but I think it should also apply to the entire war. The only difference is that the information is more likely to be wrong earlier in the war. Person X, Y, and Z are all on different teams by the way. If person Y and Z were on the same team though, it would make sense to share the information.