Refusing to play mafia is a crime. I'll call the cops on you for that.
But seriously though, there is a lot of peer pressure on it(mostly by me lol. Can't count the number of times I've pm'ed ppl to play mafia anymore). It's highly addictive but I don't think that addiction is due to the game itself. I think the main reason we get dragged back to it is all the friends we have made by playing it. It sounds cheesy but it is what I believe. Even though we're all just strangers online, all the bonding we've made are genuine. The emotions and feelings that are produced from playing this are real and authentic. We start out playing mafia because we find it fun and interesting but we stay and always come back because of the people we met along the way. Personally, playing/hosting mafia on another forum is not the same as doing it here. I can still find enjoyment in it because I love mafia but I know I would enjoy it to the fullest over here because I love this community even more.