First things first.
1. How often do you feel you use meta as an argument in Mafia?
2. Do you prefer proactive (using as a reason to investigate a player's actions) or reactive (using to backup/contradict what a player did) meta?
3. How often are you to research meta on a player whose meta you don't know in the game?
4. Do you prefer to use meta to defend a player as being town, or attack them for being scum?