One thing I've done when talking to cryptobros and other privacy extremists is ask them to think back to a time (and we all know they've all done it) when they railed non-stop against the "banksters" and consider how much more power and influence they would have if the rules they themselves want regarding privacy are applied evenly to all circumstances.

There are a few people, and I'm inclined to believe them, who say "yeah Capital One and Deutsche Bank have the right to mask their cartel money laundering activities under the concept of absolute anonymity and any attempts at know-your-customer or records-keeping requirements for banks are antithetical to freedom" but they are very rare.

Again, I believe those people are being earnest because I know extremists exist for every position.

But most people just shout "THAT'S DIFFERENT", get angry, and call me a boot-licker or something like that.

edit: another scenario I use is:

Privacy-conscious business owner: Hello yes, I would like to start a business selling car seatbelts whose webbing is impregnated with a fire retardant that we know will cause fatal cancer.

Evil Government: Ok, please fill out this paperwork to get a business license and provide points of contact so people can sue you when they get cancer from their seatbelts.

Privacy-conscious business owner: No. That is a violation of my rights. I have the right to perfect anonymity.

Evil Government: I suppose you've got us there! Have a nice day.