<p>Everything someone has to say about themselves is personal information. Not all of this personal information, however, is information that should be kept secret, for whatever reason. If you feel like telling one of your friends that you’re sad because the summer is ending, and if you don’t care about other people reading this, you could freely write it on your friend’s wall. Yes, it is personal information, but it isn’t information that is important, and thus personal in the sense that you’d rather keep it to yourself.</p>