Facebook and the Social Dynamics of Privacy: Analysis of privacy on social network sites

I haven't read this lengthy article completely (I might never have time to finish it), but thus far I've found it to be thought-provoking, and unusually in touch with its subject matter. Most articles about Facebook seem to be written by people who are mystified by its appeal, its users, and the broader changes in technology and society that are enabling its success.

Perhaps this is explained somewhere later in the article, but this bullet point confused me:

"Giving users 'ownership' over the information they enter on Facebook is the worst idea of all; it empowers them to run roughshod over others' privacy."

How would giving ownership over the information a user enters on Facebook empower that user to run roughshod over others' privacy? Am I misinterpreting something, or missing something?