What should forum policy be on defamatory posts?

The forum software doesn't seem to be working properly  but this is in reply to Kamarling's post

Pssst is a different kettle of fish.  He states far out opinions in a manner similar to a religious fundamentalist and then refuses to give evidence when asked.  He is making a mockery of this forum and your mockery of me is trolling!

I think the policy is toleration of everyone at the moment. What I would like to know is, why did Kamarling get 3 likes for copying 3 of your posts when I only got one for a dozen posts debating with Chuck.