Actually, recently there was a court cases where a news organisation (News Ltd) was sued for defamation because of comments about an article posted to Facebook.

Actually, recently there was a court cases where a news organisation (News Ltd) was sued for defamation because of comments about an article posted to Facebook. Which is nuts. And which this legislation is trying to, rather ham-handedly, fix. Also, it puts pressure on Facebook, which may actually be the secondary purpose.