Board Thread:Support Requests - Getting Technical/@comment-4839035-20130218202430/@comment-3335785-20130219160501

It's something unique to the skin, thus considered a core feature and uneditable.

I seem to remember some mention of Message Walls being forced on everyone from a while back, which was reconsidered due to sufficient disapproval from some wikis. I'm sure Wikia would like a consistent look, but right now I can't say they're extensions are as complete as they could be from a user point of view (I couldn't begin to improve upon it myself).