We suspected Ironloki was associated with another troll account. He kept constantly getting in an argument with other users on chat, and was banned from another Wiki, the Community Wiki, for being abusive, and used the excuse that his brother went on his account- but there is simply no evidence to prove that and also he only decided to bring it up after the ban to try and get himself out. Also, a user, Lawzlow1, left a flood of spam all around the Wiki, 'coincidentally' after we accused Ironloki for the first time. We had no choice but to ban Ironloki as well as this other account and since then we haven't had troubles.
Ironloki can always just make another account and start over but he hasn't yet.
We could be wrong, but the law stands, there's nothing more we can do and we're just doing our job. Hope that explains it. :)