pretty sure IMPULSE once claimed to be scum throughout a game and didn't get lynched.
there was also hiphop mafia where the scum team started arguing, got mad, and basically all admitted to being scum all in the actual game thread. they ended up winning.
the game Pez ran, Assassin in Pez Palace or something like that, Impulse was the assassin and admitted to it jokingly and I tunneled him because of it and I was right. I think he eventually quit that game and replaced out if I recall correctly.