I only deny that they can effectively blacklist within this system short of a ban.
They can blacklist, because they can effectively force users to not use anonymity.
I disagree, unless you are saying that that by controlling mining they can refuse to include anonymous transactions. My opinion is that is effectively a ban. I would likewise make the same comment about forcing people to give up passwords and such.
Those sorts of draconian measures
may work, or they may not, but I see little point in discussing them with no real information, or lacking a complete analysis of the relevant scenarios. Again this comes down to "there might be a flaw" (The Ban Flaw).
I have stated that several times. I feel like you are arguing disingenuously. I refuted your point about them needing to do it before coins have already been mixed, because:
1. There are always new coins from mining.
I don't see the relevance of new coins. How does that work?
For me a ban means no coins can transact, i.e. it is legal action that requires an unknown justification. Rather blacklisting would be a different legal action that has established justifications already in AML, KYC laws, etc.
New coins are not mixed with any rings and thus are not part of any blacklist cascade. They can be transacted.
A blacklist can be more effectively enforced at the miners than by a law that must be enforced other ways.
I really don't know what it is so difficult for you to unconflate banning an entire coin and blacklisting. Only coins in the blacklisted cascade wouldn't be allowed to transact.
Indeed controlling the miners is an effective way to incentivize people to give up passwords and such, as the blacklisted coins are dead.