Have you ever heard of Postsecret?
I did a Postsecret tribute thing a couple years ago where I got a bunch of people to go into a park, write their secrets on a index card, put it into a balloon and blow up the balloon with helium. Tie a string on it and we all let go at the same time.
It was all anonymous so if someone were to find the secret, no one would know who it was. It was more of a release for most people, just to get their secret out :)