Board Thread:Support Requests - Community Management/@comment-452-20130322205750/@comment-3335785-20130403172850

RuneScape Wiki doesn't have project user groups. The only non-standard user group is the custodian user group, which can move files, suppress redirects, see deleted revisions (including those which have been revdel'd) and edit certain namespaces which have been protected for various reasons. Call of Duty Wiki have extended this to allow custodians to delete files (and maybe pages I'm not sure). Call of Duty also have a blog patrol user group for deleting and editing blog posts.

Some wikis use existing user groups to denote belonging to a project, or heading up a project, such as Assassins Creed Wiki or Bleach Wiki. Access to extra tools might also signify higher standing in the community, or more of an administrative role without being an actual sysop.

In my experience user groups rarely give any credibility to the users with the tools the group provides. Rollback makes vandalism a little easier to revert, but an experienced editor can actually go without, without any real issue. Administrator tools are basically for vandalism control at their heart - they can block, edit abuse filters, protect pages, etc. - the role has evolved over the years, but they aren't anything special. If a project calls for some sort of maintenance then a user group might be useful, otherwise the tools might as well be titles rather than being, well, tools.