by Claudine Zap Let's face it: What you do in college should stay in college. The late nights, the parties, the contracts signed. Wait, what? If you're Mark Zuckerberg , CEO and founder of Facebook , this is the kind of thing from your undergrad years that comes back to haunt you. While he was a student at Harvard, Zuckerberg may have signed over 84% of his social-networking company to, well, basically, some guy.