Media companies and other entities maintaining public Facebook pages (or similar social media pages) that invite and encourage third-party comments are publishers of those comments for defamation purposes, regardless of whether they had knowledge of the defamatory content, and must rely on defences such as innocent dissemination rather than denying publication.
The full text is available to signed-in members, including the 7 later cases that cite this judgment.
1 of the 7 citing cases carry a classified treatment. How each court treated it is available to signed-in members.