That's why none of out black-listings are permanent, since we know there is a good chance they will mature a bit and not act like such an ass.
I honestly don't think he will change at all. I mean come on, if I would want to, I could fill at least three sites with chat logs of him raging and telling people he will ban them.
And, just look at what he does now. Now that he's not respected anymore, he just doesn't play on RND servers anymore. He doesn't even bother writing a proper excuse or explanation in here, which shows how mature he is once again.