Hi! just letting you know that you can handle him, because way I see it this between for you two I don't know exactly what has happened with you two. Regardless I know that you are trying to tell him "let it go" but he doesn't seem to get the hint.
I have only one request, don't let him vandalize the Wiki no more.
My sugestion is to delete all the posts concerning him, thats just giving him attention by acknowledging him. Then once thats done, Ban him whenever he shows up and delete anything he posts/says in the future.
Yes, I know that you are not admin neither I am, but it seems that one of your admins doesn't have internet and Mr.Blue Bird comes in the once in the week or less, our bureaucrat Lordofduel come's to this Wiki rarely. The point that I was trying to make since he come's here because of you, maybe try to talk sence to him like you have done, I apologize for not being more accurate with my statement. You have noticed that I made the "Solution" blog yesterday, I wanted say that I'm trying to ignore him this point forward and letting you handle him. Unless he decides to do serious vandalism once more.