Board Thread:Support Requests - Community Management/@comment-26568136-20161012044616/@comment-24258073-20161012045944

I suggest you just continue blocking each account as it enters your wiki to wreak havoc. It'll be a pain in the neck, but it does stop after a few months, when you're least expected. You may be able to request that your site be temporarily protected against non-admins from editing it. Or maybe you could try and look for other users who may be willing to become admins on your wiki so that they can keep an eye on it while you're absent.