These are excellent points.

I included the permissionless exit question to get at this, but I think "Can you be shotgun KYCd?" Is better.

I should also change the long version of the question Can you be frozen? to "Can you be prevented from moving your money around within the protocol without shutting down the whole thing?"

There is a difference between freezing a person's account and shutting down the entire service/protocol. If a business has to shut down in order to freeze you, they aren't freezing you, they are ceasing to operate.

Also: can fedimint guardians collude to deanonymize me or target my specific ecash tokens, or is their collusion limited to not adding any new entries to their database? If it is the latter, I think it is fundamentally different than liquid where functionaries could target specific transactions to exclude from blocks.

Specifically targeted freezing is far more dangerous in my mind.

With ecash, they can't tell which tokens are mine and that gives me a little power that I don't have in any of the other systems.