You can talk to friends and family without making it public. Increasingly, you can't. I understand your decision to avoid making your own comments public as a

You can talk to friends and family without making it public. Increasingly, you can't. I understand your decision to avoid making your own comments public as a rule, but once you've said something to someone, it may go public through their use of twitter, facebook, et al. As more people start lifelogging and vlogging, it will become likely that you're effectively in public at any time, even in the "privacy" of a friend's home or your own.