Board Thread:General Discussion/@comment-5448890-20140704011520/@comment-4018164-20140704054312

If a user truely causes problems in your wiki, despite warnings, it would be a good idea to just block him/her or chatban them, depends on what they've done. A "vacation-like" block is unlikely to provide the same deterrence as an actual block does, and perhaps even motivate certain users to break certain rules, knowing that they may still be able to edit while blocked.

No existing MediaWiki extension seems to provide something like that, so you should probably contact wikia about this user group, and see what they can do about it.