User blog comment:Agar-Dragon/Community Central chat!/@comment-28637226-20160603064225/@comment-5454372-20160603161202

I have actually seen ways to effectively prevent desktop users from being able to post on a given user's message wall by messing with the settings and layout of Message Wall Greeting, but I'm not sure if the users who were doing that either chose to stop using it, or were directed to stop using it by Wikia Staff due to it arguably being a way of hindering a Wikia feature from functioning as expected (purposive reading/interpretation allows the ToU to stretch quite a bit depending on how Staff wish to interpret it).

Perhaps that's one way of starting though: go to Message_Wall_Greeting:Agar-Dragon, and leave a message about how you'd like people to contact you if you'd prefer not to have them contact you via Message Wall. Be sure you've got a separate page set up for that purpose though, whether you periodically make a new blog or create another subpage under your own name.