After discussion with Electric Butters I think I see some need for further clarification of my overall idea for such a theory child board.
The source for this idea comes from my experiences with the Theories sections of the now defunct website WoTmania where members would express their theories pertaining to the Wheel of Time. Other members would vote Up or Down on the viability of the theory, and below was a section for comments on the theory, but the main point was that it was a place to enshrine unique theories which were indexed by topic.
The parent Spoilers section would still be viable for asking questions, general discussion, and also for discussing more vague, less conjealed ideas that might be in the process of being pondered, developed, and digested.
The "Peer modding" wouldn't necessarily be deleting any posts, just maintaining the links in the table of contents stickies. If a repeatitive theory, or question manifested, it wouldn't necessarily be deleted by these peer mods, it would just not be linked to in the table of contents, thus allowing it to decay.