In some other communities, there have been discussions about the use of the "Community wiki"-function. The policies seem to differ from site to site, so before it comes to any problems here about what should be CW'ed and what should be deleted: What is our stance?
The Future of Community Wiki (on blog.SE) (Official Stance of SE, it seems)
A similar discussion on RPG.SE (As a reference for possible stances on the topic)
(Feel free to add to this list)