User blog comment:Dopp/Communicate Easily with Message Wall/@comment-2179868-20111007214605/@comment-26753070-20111008010156

"this is heavily discussed internally it does allow it somewhat - Users that the Wall belongs to can clear it too, not only admins"

However, it's not just admins that do maintenance work and it is counter-productive to leave someone a message to edit a message to change something in their old messages when you could just edit their old messages yourself.

Also, my home wiki a lot of our countervandalism is performed by non-sysops, and it would result to them having to request them to deal with spam that they could previously take care of themselves.