If you decide to report a post on the forum it says that your email address would be revealed to the moderator
Before talking about the next question, I would like to let you know that the forum allows users to register with dummy (unreal) email address. Some applies it to change their emails and abandon their accounts.
You can do it too but make sure if you don't want to abandon your account, you must stake your Bitcoin address with a signed message from it. That will be helpful to recover your account, just in case in future.
does it mean your email address would be revealed to only the moderator that handles the case?
Perhaps it is a warning message with old forum and theymos forgot to adjust the message to avoid confusion for members