[rrll22]

> Every Satoshi can be traced back to when it was mined

This is blatantly wrong, do you have a source for that? Transactions can have multiple inputs and multiple outputs; "which satoshi comes from which input" is not a valid question; transactions are about value sums of inputs and outputs.

[acdha]

Is there any reason to think that the taint bit wouldn’t be applied to all outputs from such a transaction, just as a mob money laundering operation didn’t avoid prosecution because some of the income was legitimate?