You know a defamation case is going to be a good one when it starts like this:
Political debate in the Internet blogosphere can be, and, often is, rude, aggressive, sarcastic, hyperbolic, insulting, caustic and/or vulgar. It is not for the faint of heart. This case is an action in defamation involving political bloggers on the Internet.
The case is Baglow v. Smith, 2015 ONSC 1175. One of the issues in the case was whether the moderator of a message board who does not remove defamatory content is liable as a publisher for defamation purposes.