That's a good one. Anyways, I'm like Khush here, in that asking for a PM is a no-no. I started the opposite way, realizing a powerful weapon, but afterwards, it became obvious that things can be faked, and that the whole deal is trouble. I have to agree that a major part of mafia for the townies is the PM's, but that they can work for the mafia too, and turning them off for the townies and not the mafia would be a mistake, causing major balance issues.
Something I'd like to see is for a roled player, someone akin to the Investigator, to reveal himself immediately on day one, and though he would die if no doctor were present, all of the rest of the major townies would be able to locate each other. This is similar to what I tried on day two, but there were issues with trust, both in the "group," and out of it.
As far as the votes go, I've never voted out someone who was worse than a townie on day one, though I've been in games where this has happened like this one. I've used strategies similar to Khush's where as a townie, I would organize and force a vote on a player. If he or she had a role, that player would live and be part of the alliance. If he or she didn't then odds were that player would die that day. It worked pretty well, but took a lot of Day 1 work.
As mafia, I think one of the funnier tricks to pull would be to fake an accident, and send a PM to a townie player. Then, after you die, the townies would go after players mentioned in the PM, and after that, the townies would go after the player who posted the message, allowing a two-for-one, but with nightly kills, it would be five-for-one, hopefully. It seems like it would be valuable in the late game to finish things up. Spak inspired that one, after sending me two PM's on accident a few games ago. We thought he was lying in one.
I also admit that if I know I'm dying, I like to make a ruckus. For instance, in this past game, I knew that if I tried hard enough, I could either look like I was going to have the doctor's protection, or I could just try to draw both hits. I decided I'd do whatever it would take to get both but to unite the townies, which didn't work. I pointed fingers at a player who seemed fit to point fingers at, but I had no idea about his affiliation, 18 Days. I knew he didn't have a townie role, because I knew he would have done something a little more if he had, but I knew that if I said he was mafia if I died, at least one of the two killing parties would hit me, since he couldn't be in both. I also knew that if both hit me, he wouldn't be in either, for cover reasons. Unfortunately, the player I relayed this to was a mafia player, and no one else important had followed my rules for me sending a PM that day, aside from Vudu, who wasn't trusting for my reasons. Of course, I also said to this player to go to Pale if I died, and Pale was killed the next night, so personally, in this game, I take responsibility for GP's death, my death (twice!), 18 days's death, and Pale's death. I call that a moral victory, in the least, since it was great to see all that happen in direct response to what I said and did.
Also, one of these days, I'm going to trick a host, asking for a player's message, and not a role's message as a fake. It'll be fun. Watch out for that, future hosts.
Anyways, onto the next mafia. Pretty soon, or at least, in the future, Khush and I will be dual-hosting a mafia, which has a great theme and should be pretty exciting, we think. It's been awhile since we've talked about it, but there's some great ideas that have been laid out. I don't know if we'll be next or not, I don't know what and when anyone else is planning anything, but keep your eyes peeled, anyways. We're going to take some serious time out to think through how everything will work and we plan to try to create a very balanced game, role-wise. If you enjoyed this game, you should enjoy what we're planning out, too.