I'll work on this next week when I'm on vacation. Thanks for the reference link!
Exactly this. The UtoWiki is ONLY for things that Utopia does on its own without the use of 3rd-party tools. When you perform the Infiltrate op, it only tells you how many thieves a province has. If you have an outside intel tool, i.e. Munk/Upoopu, THEN you'll probably see WPA. Utopia doesn't do it on it's own, so it won't be added to the wiki.
As an aside, I'm back to monitoring this thread on a regular basis and I'll be doing another once-over of the Wiki on my aforementioned vacation next week. Keep the posts coming y'all :)