Updates to the message wall feature that will come when Wikia updates their Mediawiki installation have given me pause that has made me entertain the thought of shutting them off.
This is not happening right now. I'm examining what can be done (and what might change in the coming time) since the crux of the issue is the lack of ability to use wiki markup in the new extension since it's built off Discussions.
It's possible I'll broach this topic with the community if and when it becomes a problem, but note that functionality could come first if this comes to that.
This blog post is mostly for warning so no one can say something like, "this is so sudden, you never brought this up!"