arrowsmith 2 update.., page-82

Defamation only occurs when a knowingly false statement was made, that statement caused damage due to its negligence, the statement was made publicly and the statement can be proven to be false.
Say if you made comments about the PM double dipping to just steal our money or other statements that will hurt the reputation (such as the PM-Potts same person 'joke') of that person, such as have been brought up here in the past.

I think ESI is going through something like that at the moment where posters have basically made up false statements and ESI have now passed on that evidence to ASIC. Goes to show that you have to be careful what you say in a public forum such as this!