While i agree there's ethical problem, IMO it's problem between ChipMixer and the user who wear copycat signature, all we need to do is let ChipMixer representative know about this problem.
While i doubt it's profitable, there's 0.003% coordinator fee.
According to Chainalysis, Wasabi mixed $250,000,000 in 2019*. That means $750,000 has been paid in coordinator fees, which seems pretty profitably to me Wasabi is not a profitable service
While i doubt it's profitable, there's 0.003% coordinator fee.
.*source: https://bitcoinmagazine.com/articles/chainalysis-most-mixed-bitcoin-not-used-for-illicit-purposes
Regarding the OP, I don't really see the issue as long as it is an individual using the signature (in a non-campaign way). It would've been honorable if the user PMed the signature designer first, but you can't prevent people from using the BB code. Campaigns could add a disclaimer in the OP but there would still be no way to enforce it.
Translation: Some theft is okay, some other theft is not okay.