"You can always opt out," said the fellow at the other end of the table, reminding me of that most priceless freedom which the Internet, in all its majesty, has given me, given us, given the people. "If you don't want to share anything with anyone, hell, why would you join a social network at all?" And therein lay the small print, the disclosure at the other end of the asterisk. Opting out* is already carrying with it a social stigma, the personal choice to remain behind doors with locks and windows with shutters, to not be One of Us....