Earlier quoted context omitted.
Blacklisting doesn't have to be a feature of a blockchain. It's enough if most countries decide to make it illegal for anyone to spend coins received from a blacklisted address. It's not easy to enforce of course, but people would be afraid they get in trouble if they're ever deanonimized, and businesses could be required to report their trades, just like taxes. This will force creation and use of wallet reputation c…
Everyone already knows mixers are holding illicit coins. It doesn't matter because mixers don't actually "want" anything. They're just code in the ether. You send your coins to an address along with a receiver address and the smart contract sends coins to the other address. How do courts stop that without shutting down exactly what makes blockchains valuable?
Mixers will have to change their policies in order to avoid becoming a market for lemons in which everyone loses.
I do not expect governments to worry a tiniest bit about destroying value of an anti-government technology.