Here's the roleblocker PM from Vaughn's Newbie 529 (I'm not in it and it's open so this is OK):
Vaughn wrote: You are a Mafia Roleblocker
You and ______ are Mafia. Each night you may talk via Private Messages and choose a victim from the rest of the players to kill. One of you will private message me your decision.
The Mafia roleblocker has the additional ability to roleblock somebody, effectively preventing them from using their night action if they have any.The Mafia Roleblocker can make the kill and block a different person in the same night.You win when you outnumber the town.