Forum:How do I prevent non-registered users creating and editing pages?

I've just started up a wikia, with the intentions of using it as an encyclopedia for my webcomic, and I would like to prevent anyone but registered users from posting to the wikia. How do I stop guest users?Andy Frogman 11:43, May 29, 2012 (UTC)
 * This isn't normally something that is offered by Wikia (although it has been offered in the past in some special circumstances). See the Wiki Creation policy for more details. You can contact staff to ask, but they tend to decline these requests. --  Random Time  11:54, May 29, 2012 (UTC)
 * So what you are saying is... our only protection agains spam is reactive? Andy Frogman 12:02, May 29, 2012 (UTC)