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But what if law enforcement goes to the biggest miners in the world (representing at least 51% of the hashpower) and tells them that if they continue to confirm easily identifiable mixing transactions, they will be accused of money laundering.
From On Fungibility, Bitcoin, Monero and why ZCash is a bad idea. – We Use Cash
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U.S. officials have arrested the alleged operator of a bitcoin (BTC, -1.19%) mixing service on allegations of laundering nearly $336 million in bitcoin over 10 years.
From US Officials Arrest Alleged Operator of $336M Bitcoin Mixing Service – CoinDesk:
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Bitcoin stolen from exchanges through hacks also went through Bitcoin Fog