It's important not to confuse privacy with secrecy. Privacy is control over who has access to what information. Security is the mechanism by which we exercise that control. This is important to remember when Mark Zuckerberg claims Facebook users do not want privacy. He's not ONLY saying they don't want their information to be secure, but claiming further that they do not want to be able to control who sees what on their Facebook profiles, which is crazy talk of a whole different level.
Mokalus of Borg
PS - You can have privacy and security together.
PPS - And you must aim for it.