CoinJoin, a popular Bitcoin (BTC) mixing tool, will block transactions associated or flagged as illegal. The announcement came from the official Wasabi Wallet Twitter (NYSE:TWTR) account, of which Coinjoin is a part.
The official announcement noted that CoinJoin services would start blocking certain unspent transaction outputs (UTXOs) from registering with CoinJoin using the zkSNACKs coordinator. A zkSNACKs coordinator is a virtual machine used to mix the origin of the transitions.