I’m not sure what feature you are referring to.
Maybe some places allow people a place to communicate with other like minded people in ways that the rest of the community finds unacceptable? I’m not sure what would motivate OGS to provide that feature.
If you only mean that chat-banned people should be able to communicate to moderators - they can: appeals@online-go.com is this direct communication channel.
If I had to guess, I would guess that the person Kosh was referring to in the original post was upset that they can’t say “gg” at the beginning of the game, or reply to the opponent’s “gg”, so they feel like the chat ban is forcing them to be rude.
I am familiar with this complaint - it’s been made before. I find it remarkable that folk who are so rude in general that moderators have had to remove their chat privileges are yet still worried that if they don’t say “gg” they will be considered rude 