BTW, why aren't these authorities harassing banks for money laundering too if their claim of seizing mixers is to prevent money laundering? I know what theymos is trying to do here is taking a preventive measure to save the forum but I also know that this isn't likely going to be the last of government wanting more grounds to be shifted.
This is, indeed, sad.
Well, I really do not think that theymos care about money laundering through banks and neither does he care when it happens through bitcoin.
Honestly, theymos also may not care much if the forum is taken down or not. But according to his statement, it seems he really cares much about me and you, which is the reason for the proposed mixer ban.
Imagine that Abcmixer did a fraudulent transaction with an address, launches a campaign on bitcointalk, uses same address to pay upto 50 participants of the campaign. FBI uncovers them, link more than 30 addresses belonging to the bitcointalk members to Abcmixer. The 30 participants are automatic culprits or accomplice. It will take more than 10 tons of efforts to convince FBI that you are a mere promoter of the mixer.