when a logged in user post a background code into wall the background changes and can only be deleted by the account holder and administration of the site. It's easy to delete though because the post shows only the user who uploaded the code and no content at all. But anyway, not sure if common users understand that and how to explain it to them. The other option is to restrict the postings to the wall to friends etc only..
If this could be integrated in the admin section for customizing background and block background codes in the wall posting would be awesome. Otherwise the glitter graphics in the wall post look nice and especially younger people like it.
You can see what I'm talking about look here . The background was added through a post to the wall.
