Remember that wave of fraudulent attacks sweeping the Bitcoin exchanges? It’s still going on, and this time the attackers pilfered an estimated $2.6 million worth of bitcoins from Silk Road 2, the second incarnation of the venerable online drugs-and-hitmen marketplace. In a “I am sweating as I write this” message to the platform’s denizens, Silk Road admin Defcon conceded that everyone’s cash was gone. “I should have taken MtGox and Bitstamp’s lead and disabled withdrawals as soon as the malleability issue was reported,” he sweated. So much for escrow.