To be fair, due to Russian non-extradition rules this is generally how Russian hackers are arrested. Whether they are state sponsored or general black hats (e.g carders) the US authorities wait for then to take a trip into the EU or some other friendly (to the US) location and then arrest them. The guy who sent Brian Krebs heroin was a Russian hacker arrested in Italy and many other shave been arrested on their holidays to EU states.