[jgalt212]

> as long as he didn't keep logs.

It doesn't matter who keeps the logs, the blockchain is the log. I really think you are the one who is missing something. Because the blockchain has the entire history, everyone knows every transaction wallets X, Y, Z and any other wallet has ever done.

> A block chain is a transaction database shared by all nodes participating in a system based on the Bitcoin protocol. A full copy of a currency's block chain contains every transaction ever executed in the currency. With this information, one can find out how much value belonged to each address at any point in history.

https://en.bitcoin.it/wiki/Block_chain

[ikeboy]

You don't understand how mixing can work. I send money to your right pocket, you send me money back from your left pocket. At no point were your right and left pockets connected. As soon as you destroy your logs of what your pockets were, there's no way to identify which pocket was which.

Do you understand the concept of taint in block chain analysis, and how mixing can produce untainted coins?

[jgalt212]

I'm talking about tainted wallets, not coins. When a tainted wallet tries to transact outside the bitcoin system, then you're busted.