A lot of people can't get around Linux or Photoshop at all.
I think most people here can probably make sense of the privacy settings, but facebook has 750 million members. I am certain most of them do not even know where to find privacy settings, let alone know how to use them. Yes, they may be idiots for posting personal data to a site they don't fully understand, but it is reality. Simply trusting facebook not to exploit these people seems naive to me.