@figmentofmyass - I think FATF just made a recommendation about sharing informations across all exchanges. FINCEN is in charge of "enforcing" Travel Rule. BSA (Bank Secrecy Act) of 1996 was amended in 2012 to include all electronic funds transfer. I'm assuming it includes crypto and the threshold is $$3k or more.
I think crypto mixers falls under the definition of VASP (Virtual Asset Service Provider) and also includes exchanges. So I don't know if they are going to comply with this new rules or take the risk of being shutdown.
I guess there will be no privacy here, as the guidelines states that originator and receiver should exchange information. And the thing is, there will be a something to validate everything, a certificate authority (CA) to protect the communications between VASP.
https://ciphertrace.com/wp-content/uploads/2019/08/TRISA-Enabling-FATF-Travel-Rule-V4.pdf