real name. it's a difficult thing to enforce and it's never really become an issue until now. as a company, facebook has never been stronger. its valuation, 50 billion and climbing. it just announced plans for a new headquarters and helped egyptians overthrow a dictator. >> it's always been our number one goal to serve people and help them share information and stay connected. >> reporter: mark zuckerberg last year reflecting on the company's success but facebook has not been immune to criticism especially over matters of privacy. now it's having to defend one of its basic rules. no fake identities or pseudonyms. though difficult to enforce computer security experts generally regard it as a sound policy. but should facebook allow for exceptions where freedom of speech isn't guaranteed? take the example of wael ghonim, the google executive who emerged as the face of the anti-mubarak