TOD
We'd have to turn the clock back twenty years (to when the Internet went public), while retaining the knowledge we have now, to have any hope of undoing the damage to our individual and collective privacy.
Since that horse is out of the barn, the ship has sailed, and the train has left the station, I simply do the best I can at being judicious in where and what I post. I don't "do" Facebook or Twitter, so I feel my life is a little more peaceful than some. But I buy online and have done so since 1998, so there's that risk hanging out there.
I regret that there are vultures everywhere, ready to destroy personal lives and society itself. Of course they were always there, but the Internet is a weapon of mass destruction in their hands.