[Jammin]

You also kicked him for having a name 'too similar to yours,' while he was on with that name before you were (as far as I know, you're supposed to change your name).

Generally if someone has a longstanding nickname and someone else uses said nickname for the first time, I feel the person who has the long-standing nickname should have priority.

E.g. if I joined with the name "BrianBored" after using the name "jammin" for their entire time, while BryanBrr is on, I should have to concede the name change.
There is a difference between this situation, and the general rule of "first come first serve" for more common nicknames (e.g. Chad). This appears to be pretty intentional impersonation of a staff member.

All of that being said, since staffing guidelines were updated, there isn't any guidance for harassment bans other than points-based anymore. Therefore I believe proper action has been taken with Chibill's ban.

I'll let another moderator close this out in case I'm mistaken but that's my opinion at this point.