I don't really see how this is more surprising than the takedown of Liberty Reserve (a Costa Rican company run by a Russian citizen and I think other foreign nationals; among other things, it was the primary payment method for the purchase of illegal drugs over the internet before BTC & Silk Road). Or the USG seizing Mt. Gox's Wells Fargo + Dwolla accounts that had $4.3M of customer funds in them. Or the much more recent (alleged) blocking Bitfinex's ability to process USD withdrawals internationally. The USG gone out of their way to slow the growth of cryptodom on more than one occasion. And they love to go after the fictitious and ultimately victimless (other than the State, argueably) "crime" of money laundering.

I'm not saying that it's right, or that I support their actions. The fact of the matter is I love my country, but hate it's government with a passion.