Doctorow: The Curious Case of Internet Privacy (Technology Review)

That would depend on who you are. If you're a celebrity, for example, then it might not be much of a vacation if people know where and when to find you.

Views like yours seem to result from a complete lack of interest in your personal data. No one else cares about it, so you don't see any reason to keep it private. Or, put another way, your privacy is maintained automatically just because you aren't interesting enough for anyone to bother. Even so, you make exceptions for the private data you _do_ care about, like passwords; you should consider that much of this other information you're so free with can also be used to impersonate you. Enough of it can amount to a form of authentication credential. Those with higher profiles, or perhaps just a better appreciation of how that information can be misused, have reason to put more effort into protecting it.