Board Thread:Support Requests - Community Management/@comment-3551372-20150405192204/@comment-1997905-20150405210743

From what I can tell, you haven't used any range blocks at all. If you put 182.191.0.0/16 into Special:Block, it'll block every IP that starts with 182.191 - same with 182.189. It looks like that would solve 80% of your problems. The rest look like one-off proxy IPs that you'll have to block as they come up, but he doesn't look like he uses them very often.

He can still create accounts on other wikis and bring them over to yours, but blocking those ranges would make it a lot harder for him to troll you guys.