Board Thread:The Panopticon/@comment-1432718-20130308023949/@comment-188432-20130308083238

The other point is that it's relatively easy to figure out what the top level category is by clicking your way up the category tree. From most pages you're no more than six or seven clicks away from Category:Floor 500.

It's actually quite unusual for a Wikia wiki to have such an integrated category tree structure. If you go to Memory Alpha, for instance, there are several dead ends in their category structure. Indeed, they effectively don't have a top level category, but several, mostly unintentional, top levels.

So yeah, it may be confusing to the new user, but it is a good deal more rational than the typical wiki.