Here's the problem... last time we let someone keep secrets in their app, they basically had their character invent something akin to a high-power explosive, and have that blow up the guild. I'm not even joking here. I had to pull some timey-wimey stuff out of nowhere in the plot just to allow everyone to keep RPing. So, that's why I make sure at least the GM, and CO-GMs know everything about my character... and also why I'll never allow player-controlled inventors into this RP setting.