Just for the record in the Mafia thread anyone can delete their own messages. I did it when I changed my from Khushrenda earlier today. I deleted it because my vote was on completely false pretenses I thought Khushrenda wasn't very active in the thread, but he was. I just missed his posts because I read Waluigi and not Khushrenda.
So the fact that he deleted his message isn't shocking. But he needs to put it back because of the Peach power. If he doesn't do that, then I would say that is suspicious behavior.
Also, voting for someone because of a vendetta or because they tricked us last game is stupid. Last game as zero baring on who they are this game, or how they are going to be playing the game this round. So, I would be careful. We might accidentally vote out an important townie. I am personally suspicious of anyone that uses the vendetta excuse for a vote out.