You can't realistically look at the history of BTC and determine if it came through a mixer or not. They could have been legitimate transactions. >I certainly

You can't realistically look at the history of BTC and determine if it came through a mixer or not. They could have been legitimate transactions. >I certainly won't get to keep that car. No. But what if you sold a car and it turned out to have been paid for with stolen cash? And what if the cash was obtained by the buyer legitimately, but his source had stolen it? How about the same situation but three times removed? You might be interested in this proposal: http://www.loper-os.org/?p=988 http://www.loper-os.org/?p=988 ("Shitcoin is to be a distributed network for attaching “dirt” to particular bitcoins...")