The U.S. agents seized funds from btc-e exchange. So if btc-e owners want to challenge the DoJ's decision in court, they need to reveal their identity first. How does that sound to you?
How did the US seize funds without knowing the owners identity? Did they just pick someone's funds at random?
Probably following the wires. It could happens that they only could find companies behind other companies behind straw man. At least that is what often happens when Spanish justice tries to prosecute politicians and their ilegal business.