Why don't we play the game of Spies?
One person is the Spy, and everyone else that is playing are villagers/townspeople. The forum mod picks one person to be the spy, and every day/hour(s) the Spy kills one person. That one person can't play anymore, until a new round and the rest of the villagers/townspeople must figure out who the spy is. The spy will personally tell the forum mod who he is killing, and the forum mod will post the person's name on the thread. When all players are dead, or if the spy is found out the game is reset and if the spy wins he gets rep (Possibly?).
How does that sound?