Not really. The key will of course have to remain banned on servers, since there's hardly any sense in unbanning a shared key that can be abused by anybody.
Well all I can think of is Someone used a same name as me but instead of OotL as the tag he used OotI or Ootl which describes the small letter l in the picture. We use OotL not OotI or Ootl.
There was no OotI tagged guy, and your key was the one banned, which means if it was another guy, he used your account and your key. The different capitalization would be caused by him typing it that way while making the in-game profile necessary to do so.
So you used a public key, and you're claiming someone else used the same key, downloaded CRPG, typed in your EXACT name and impersonated you, randomly? I'm no detective but I'm pretty sure that's not what happened.
It's not so strange as all that. Anyone using the key would only have to create a new character for it, and he'd immediately have access to all existing ones from the dropdown menu. Then all he'd have to do is create a new in-game profile matching one of them and go wild.
Moral of the story: don't use shared keys.