So you'd rather have normal members bring their personal input into a case rather than just having them watch?
If we were to make them visible it's for the users to have an input into it, such as "it was a false ban, I can confirm, I have proof of it too etc." . Ofcourse this should be first approved.
The only reason why normal users should be able to post in one is if they have evidence to prove or disprove a case, not having a personal input such as saying "it was a false ban, I can confirm". Most forums have the dispute section open, and it also would be a good idea to make it visible so users can understand a case and know why a certain user is banned or what happened in the dispute for future endeavors.