I want to use this wiki as a company intranet. There are teams that don't want their data shown to other teams; there is management that does not want its sensitive data shown to workers; There are regular users who may want to use the wiki as their individual private diary, and then allow access to people on case-by-case basis. It's a huge user case! You already have these categories, only they are hard-coded.. can that be relaxed a bit, with categories added?

Sorry if I am not the first one to suggest that; could not find anything.