One example: Mark Zuckerberg cheating Eduardo Saverin out of his FaceBook shares. He realized that it was cheaper in the long-run to cheat him, because he knew that the eventual lawsuit settlement would be less than Eduardo Saverin would have gotten if he were treated fairly.

Actually, if you talk about it with your lawyer, attorney-client privilege protects you. Just make sure you do it in person and aren't dumb enough to do it by E-Mail.