This thread has the rules in the first post, so I think this is the appropriate place to say this.
The last two games had a member of the mafia give away their full RPM, without redacting their teammates. Can we make it a rule that players can't do that or, if they do, the people involved PM the GM and work it out with them before telling anyone else? I don't think the people who did send their full RPM did it maliciously, but we should have something in place to prevent this kind of thing happening in the future. Both Eff and Cyberknight had to make some significant game changes after the evil teams were revealed, and while I think they both did an excellent job re-balancing, it's better that such situations don't happen in the first place.
And there's certainly a place for betraying your mafia team. Some roles are designed to be backstabbers, and the possibility of a convert always changes matters. A confirmed mafia member could plant a list with some mafia members and some good members on it. But I think that, for now, we should just limit this.
TL;DR: Mafia members shouldn't give away the identity of their teammates; if they do, the players involved should work it out with the GM.
Both situations were based on mistakes, not based on intent to break a game, and I think both players have now learned better.
That said, I think that, as has been said before in this thread, the fewer official rules, the better. As you've said, somebody could plant a fake list.
I think the important thing here is that we urge caution and strategy, more than that there be a specific rule put in place.
-Superstars111, Grand Master of Nerdiness
The Wookiee who Wouldn't Die