Don't use Facebook, Twitter etc and your Information attack surface gets a whole lot smaller.
Not as much as you might think. FB, Twitter, Google, etc have their little snooping presence on a huge number of sites across the internet. They have such a dense web presence that even if you block all their domains, they can still uniquely track you through timing and other methods not requiring any connection to or data transferred to or from the target. Make no mistake, these guys rival (and probably surpass in some areas) TLAs in the sophistication of their tracking methods. It's their bread & butter, after all, and they have a LOT of capital and manpower to throw at improving it.
There's a distinct danger here, as a previous /. article earlier quoted a FB guy talking about molding and shaping public opinion. With the advent of AI on our doorstep, this could be very, very frightening. FB, Twitter, Google, and possibly other social media will literally know you and what you think better than you do and be able to predict your actions and reactions quite accurately to any particular stimulus or information, and that opens the door to insanely powerful tools of mass manipulation.
We'd better get a handle on this now, or it will have a handle on us!