Phoenix has a pretty good idea, there. People can begin their posts with some defining marker - [W], [P] or [A], for example - depending on the post's particular medium of expression. Even if someone forgets, it wouldn't be too hard for the Knights to keep an eye on the threads, adding them where forgotten. Better to keep up consistently than try to seperate it all out at the end.
(Golly, wouldn't that be fun, when half your modding job becomes tacking referential symbols on topic titles? Although, while i don't know squat about vBulletin, i would think you could set up a "multi-mod" shortcut to make it easy as hell.)
i dunno. Just my two cents.
