I would add that either the poster or the receiver could mark any wall post private.
AND that neither "private" vote could be over-ridden.
So if you mark it public, and I mark it private, it stays private. And visa versa. If you and I both mark it private, and you change your mind and mark it public, it stays private because of my mark.
So we have to have agreement of both parties to make a wall post public.
I am 100% for that, as a flame war reduction (not prevention) idea.
