I really can't stand sometimes how you get into a game, and just because of your color, or the bets, or your reputation, people will immediately target you. I can't say I personally have experienced much of this, but I see it all the time. That brings me to my game idea:
Rookies Anonymous:
When joining the game it asks you to input your username, and design your avatar. You can pick any user name that isn't already in use in your game. Once joined, people would be unable to click on your character to receive information about you. Your identity would be completely HIDDEN.
Not only that but you can then assume the role of anyone you want, and try to get other houseguests to believe you. If I want to say I'm biodork so people will ally with me, I do it. Ultimately people can become whoever they want.
It wouldn't be until the end of the game that everyone's true identities are exposed, and karma and T awarded to the winners. I think this game mode would be extremely exciting and cut throat. It would give players the ability to lie cheat and steal their way through game after game if they so choose without hurting them the next time around.
Plus if you like the idea! That includes you randomize! :)
http://www.tengaged.com/blog/wall0999/198429/random-biggest-loser