Why would you use a custodial (and trustful) mixer rather than atomic swaps to and from Monero [0]? Maybe the NK hackers don't need real privacy?
I think bitcoiners already use a new address for every transaction. They call it "HD Wallets".
>Otherwise someone will use their tumbled BTC to pay you and you'll get blacklisted from using it in exchanges.
This is a non-issue for cryptocurrencies with mandatory obfuscation like monero. Worst case scenario, you swap your tainted BTC for monero[0] and take the monero to an exchange.