Then what happens when one of 'us' does something wrong, do they get thrown off the island?
Shitttt .... I can't swim!!!

Seriously, I have to agree here with Lee and say that if you don't want certain sensitive information to go out on the net, don't put it there to begin with. Use the PM, skype or icq services, or create a password protected temporary chat room and invite those you want to discuss the issue with would be my recommendation.