From the very beginning of Facebook's existence, there are questions about Zuckerberg's ethics. According to BusinessInsider.com, he used Facebook user data to guess email passwords and read personal email in order to discredit his rivals. These allegations, albeit unproven and somewhat dated, nonetheless raise troubling questions about the ethics of the CEO of the world's largest social network. They're particularly compelling given that Facebook chose to fork over $65M to settle a related lawsuit alleging that Zuckerberg had actually stolen the idea for Facebook.