The site exists to document the lives of and poke fun at some of the most vulnerable people in society. Even if explicit calls for illegal actions are banned, being featured on Kiwifarms is like having a target painted on your back. Their efforts to violate these individuals privacy and pry into every aspect of their lives is just incredibly immoral.
If Kiwifarms users can't see that what they are doing already is unethical, why should anyone believe that they truly think these other illegal actions are wrong? They just know not to talk about it out loud because then you will actually get in trouble with the law.
The only reason the site has been able to get away with it for so long is because they are targeting vulnerable people who are least well equipped to legally defend themselves.