I put their name on the wiki in the "banned staff" page, and they removed themselves.
I put them back and locked the page.
A few hours later, I got an email from one of them threatening to sue me if I didn't remove their internet nickname from the page (the page said absolutely nothing offensive, just gave out their nickname and said they were banned in 2006).
I still refused to remove their names.
After a while, debating with the other staffers, we thought removing them would be best anyway. These people aren't worth remembering.