I don't know if you were aware of this feature, but it's possible to permanently ban users by selecting "Other time:" from the drop-down menu in the Expiry field and then typing "infinite" or "indefinite" in the field under that.
Obviously, we don't want to do this to anonymous editors (i.e. those identified by their IP address), but it's a good way to deal with named users who have no interest in making meaningful contributions to the wiki. That's what I've been doing to users like UgliestGrannyAboriginal/HotBlackWoman/BlackMonkeyCriminal who create accounts solely to upload pictures and vandalize as many articles as possible. It's pretty pathetic that some people have nothing better to do with their time than post nonsense and racist screeds onto wiki articles, but I don't see much we can do about it aside from dealing with the problems as they arise.
Hey there, as you can see we've just enabled Message walls, which we hope will work better in the upcoming Civ6 launch. Old messages are available by clicking the link at the bottom of this page.
Now available is also the Discussion module which I encourage you to check out and contribute to, so its a bit populated leading up to the redesign of the wiki and the launch of the discussion feature on the mobile app. If it works well it could be our main forum of discussion!