My first thought on this whole line of question is that protecting our privacy is the short term goal, but shouldn't the long term goal be to, well, be able to be free?
Personally, expressing myself to the world is quite important, and I willfully show everything to everyone on facebook, because I feel the most confident about myself that way. I smoke pot once or twice a year and I'm a computer programmer at Bioware, and if they want to fire me because I shared some personal information online, then that's their loss. (N.B. - I don't share this information with my parents, because I still prefer some privacy.)
So I interpret this whole thing positively. If everyone just damn well admits that they smoke pot, they can't ostracize the one who does it openly. There will always be some sense of privacy required (anything you aren't comfortable sharing) but my opinion is that the first concern is protecting your right to share information without the fear of reprisal.