"Shutting down Rustock could put a huge dent in spam worldwide," reports CNet. Indeed, tech security giant Symantec estimated last year that Rustock was responsible for 39% of the world's spam. "The shutdown is one of the rare victories against cybercriminals who use botnets, or herds of compromised computers, to wreak havoc on the internet," writes VentureBeat. "It shows that technology can be used to perpetrate cyber crime as well as to hunt down cyber criminals."
As WSJ explains, Microsoft has taken an aggressive stance on "Internet nuisances" like spam, which it believes inflict harm on its product and reputation. Along with U.S. marshals, Microsoft's digital crimes unit raided Web hosting facilities from Kansas City, Mo. to Seattle, Wa.
Alas, "At the moment, it's safest to say Rustock has been made inactive, rather than having been taken down," according to DigitalTrends.com. "The estimated million infected zombie computers are still out there, and if Rustock's creators are wily they might be able to regain control over some portion of them."