A number of of such contracts are unused these days, belonging to more mature versions of Tornado Cash. An entire list of OFAC-sanctioned clever contracts that relate to Tornado Cash’s Neighborhood maintenance are available in Appendix B. Security aside, having said that, this may or may not be privateness enhancing. https://baihongprint.com/why-tornado-cash-is-the-go-to-privacy-protocol-for-copyright-users/