My first thought was how to determine if the recipient was a citizen. Is it naïve of me to think that bitcoin’s anonymity plays an important role in being asked to police it, that I think it’s easy to get away with it
It's common knowledge that Bitcoin isn't really anonymous, but pseudonymous. And "getting away with it" is probably not as easy as you think, especially for the common folk who frequently interacts with centralized KYC exchanges. Have you sent bitcoin to/from a centralized KYC exchange? Yep, your non-custodial wallet is automatically affiliated with your personal info.