Would it be possible to place the various guild pages in a separate "Guild:" namespace? (See http://www.mediawiki.org/wiki/Manual:Using_custom_namespaces for how to set one up.)
This would provide a more clear separation between game content in the "main" namespace, and user related (vanity) content in the "User:" and "Guild:" namespaces. For example, this would make it clearer to (new) users that the guilds are player run entities. Moreover, it would facilitate easier monitoring of the main article namespace.