1) You cannot tell anyone your role without warranted information.  As a town member if you start off the game revealing your role and everyone's role, the game will not be fun.  However, it is encouraged for the Mafia and Rouge factions to lie about their roles obviously!
2) You cannot bully others for votes for eviction.  If you have evidence (or in mafia and rouge case lie), report it in the comments.  After a bit a live vote will take place.  If a majority is reached, the nominated player will be able to make a defense before he is decided guilty or innocent.
3) Dead players may not participate by influencing the game in any way.