From my point of view, mixing isn't inherently criminal behavior either.... As a matter of fact, many people (including myself) use(d) mixer to increase their privacy. It's nobody's business how much BTC i hold, that's private information (just like my FIAT balance on my bank account).
I'm not in support of the privacy alleviation and censorships that the US governments are coming up with, but if that's justifiably a way to detar the money laundering cases globally, they have the upper hand.
Secondly, your FIAT balance on your local bank isn't your privacy; I'm not sure what term your local banking system operates with but, I'm sure that if a huge fund drops in your bank for the first time, they'll likely wanna trace where, how and to what the funds goes for..
But this didn't stop the world's governements of attacking all mixing services, so i don't see why they wouldn't increase their attack surface by making every service that isn't 100% KYC and actively working with them a valid target.
But that discussion is deviating from OP's initial question i'm afraid.
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