The (legitimate) argument is that freedom of speech extends to facebook getting to decide what, and in what order, information is displayed on facebook.com.
To dictate a chronological order, or to demand that they publish every single thing that is submitted to them, is a restriction of their freedom of editorial expression on their own website.
To dictate a chronological order, or to demand that they publish every single thing that is submitted to them, is a restriction of their freedom of editorial expression on their own website.