You already told back at ROBLOX.com. Yeah I think u should ban him for revenege OR try to appeal to him to change his mind, or even delete the content from the wikia that makes it simliar to the MH wikia. You said you wanted to test badges so I have a few question for you.
can you delete badges if you don't like them?
can admins like me have the power to add badges? Why did it have to be similrar to the MH Wikia?
Did you not think that anyone would care? (I dont care what ur answer is for this)