Thread:Ripto22475/@comment-31423430-20160622043356/@comment--20160622045249

Yes, it's possible to prevent users from posting on a specific message wall. The use of DisableBotMessageWalls script does the job and setting up an Abuse filter can also disallow people from posting on a wall.

There's probably other ways, but those two are the ones I know and get the job done. Usually you would only want to block a message wall if it's the wall of a bot account or something. I don't believe it's recommend to block your own message wall.