I know what he said so let me clarify. Facebook's wall permissions break down into three groups of differing granularity:
1) Who can see a given post by you on your own wall: Each post can have different permissions w/ groups.
2) Who can see a given post by others on your own wall: All posts of this type are controlled by a single permission assignment with groups.
3) Are friends allowed to post on your wall: This is an all or nothing setting. In other words you can either let all friends post to your wall regardless of visibility or none.
My question was, what happens when you allow friends to post on your wall (item 3) but not give them permissions to view posts? This would be a somewhat awkward situation, hence my question.
> I have a whitelist (a list of friends) that sets who has access to my wall.