Even if they were all right, the solution for the blacklisted user remains the same: Switch to a different coordinator.
Would you use a privacy-preserving software whose developers don't respect your right to privacy? Not only I would not, but I would even feel offended, and would recommend to avoid. Especially at the very moment when there are software developed with better intentions.
Software doesn't run on intentions, it runs on code, and it's all open source, and you can use it with any coordinator, including your own.
Now can you answer my question?
I cannot answer to your question until I firstly verify claims such as this one on Twitter. Why isn't it a WabiSabi coinjoin? Is the user crazy, or is it just an old coinjoin model from Wasabi?
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That coinjoin is the old zero coinjoin model. And this case wouldn't matter even if it was a WabiSabi coinjoin because the address is being reused: Since Wasabi is a non custodial wallet, there is no way to prevent users from sending to an address twice.
Now that you have confirmed the answer to your question was "No", answer my original question:
I'd be impressed if you coordinated a JoinMarket coinjoin that was as private as a WabiSabi coinjoin. Can you give me an example of one?