I agree, that's why I specified the ethereum ecosystem, not just the protocol. For instance, Infura and MetaMask have already blacklisted the OFAC addresses, and those services are critical to the workflows of MANY services in the ecosystem.
https://github.com/MetaMask/metamask-extension/commits/devel...
It says they blocked RPC requests from TornadoCrash, and that MM could no longer access Tornado Cash funds.