I think that idealistically we hope that people will at least give a once-through just-the-highlights read to the various treaties on the Wiki, and the million-and-a-half times we've made various announcements through many channels of our existence.
The problem with the wiki is, although it can be regarded as IC info, it is not a mandatory reference. I know quite a few players that never bother to look at it at all. For Dwilight I don't just peruse the wiki for info, I have quite a few guidelines that dictate what parts of the wiki Juan is legitimately going to have access to. I don't brook with the idea that everything on the wiki is going to be found in every library across the island, but that is just a personal preference.