There is a misconception. This is not a private Discord server or WhatsApp, nor is it any form of private chat. It's not even a Discord platform where you can engage in trolling with these types of posts without facing consequences (or less strict ones, although discord take those actions as well). This is a forum. Explicitly, any posts made here can be viewed via Google search, and Xenforo has strict Terms of Service regarding the sharing of IP addresses. Whether the posts are fake, non-malicious, or intended as a joke ("doxxing" in a joking manner), it holds no relevance here.
I have many friends who own forums (as I collaborate with them). There are stories about forums getting blocked due to such instances. Additionally, Fandom does not tolerate this type of content, even if intended as a joke.
Therefore, there's no need to make jokes about doxxing other users, as this is a serious legal offense.