Could someone please clarify the How and the Who.

How would this OT section work? Obviously, one cannot expect the Seekers to know whether a question is "properly" topical. One wouldn't want the Seekers asking if they can ask, or some other meta noise either. Who would be categorizing the nodes, and by what criteria?

AFAIK, the questions that aren't of interest, shouldn't have been accepted in the first place. If this is the distinction, then you already have an OT section—the graveyard that is unapproved questions. I tend to check the Recently Active Threads, and wouldn't like the Puzzles^WQuestions section being arbitrarily split into two.