Set up a place where we can suggest moving miscategorized nodes. There oughtn't be an XP bonus for posting there.
Let registered posters each volunteer to take one or two questions. They'll arrange the answers into one comprehensive document, weed out the cruft, and polish things. Pending approval from a couple of other monks, replace the whole thing with the new writeup.
Make Categorized Q&A read-only by normal monks. That'll prevent miscategorization in the future. I see these as mini-tutorials.
Post a link to the Q&A section near the place where you can post a new SoPW question -- "Want a fast response? Did you check the perlfaq? How about Categorized Q&A?"