As Lämmchen mentioned, all username changes are performed by an Admin, which is how I originally set it up and we still did even though at one point we had a shop with an item to allow you to change your username.
If disagreements can not be done without name calling or antagonizing, then moderator contact will occur. If there are concerns of what a member is posting, please utilize the report post function and leave it to the Staff to review with no further reply needed. I’d like to see great discussion...
They came with the following addon that we use. I was not aware that those forum icons would show up, and they have been removed from the addon.