Social media campus policies frequently turn concerns of academic administrators into free speech restrictions. Even at public universities -- from the University of Kansas (KU) to Northern Illinois University (NIU) -- such policies create boundaries and a chill on the marketplace of expression.
Popular political speech needs no protection from the First Amendment -- it never has. It is unpopular political speech -- even downright lies -- which need defending by the courts. As ignoble and as impure as that may sound.
Bloggers possess significant First Amendment protections against "prior restraint" through injunctions. A Florida Court of Appeals reversed an injunction against "... defamatory blogs in the future" in a lawsuit involving a blogging former tenant and a commercial landlord.
In fact, there is nothing to stop the U.S. government from censoring the media with regard to revelations such as those contained in the Snowden files -- nothing, that is, except longstanding tradition.