I think that a way to remove the LS by the master would be efficient to keep this sites data updated. Or perhaps an option to mark / tag a linkshell as either "Retired" or "Replaced" (Example when a leader creates a new shell but does not destroy the old one in order to not be bogged down by PC's that are no longer active).
This is based on the question originally asked in this http://www.ffxivpro.com/forum/topic/19245/how-to-remove-ls-listing/1/#1172087 post.