This does raise some interesting questions. Let's say BlockFi did not want to accept ETH that came from TornadoCash or another coin mixer. For how long does it stay tainted? If you then traded that ETH for another asset on Uniswap, is the ETH still tainted for its new owner?

Also is there any way to check for whether funds from a certain address are likely to be "tainted" or if I am going to use a dApp that would taint my own funds?