They simply can't. This is very different from closing down some "piracy" sites. In this case they need to mess with data on your computer. Do you want FBI to h

They simply can't. This is very different from closing down some "piracy" sites. In this case they need to mess with data on your computer. Do you want FBI to have a legal way to read, modify or destroy data on your computer? Even if you want (which I don't believe), there is no way that would work on international scale. I remember a case from some years back when some group (some AV group or something like that) took control over a major botnet by taking control over domains botnet would use in future for receiving updates/commands. The algorithm was pretty sophisticated as it generated dozens of new domains each day and was trying to contact them on random. E.g. generate 100 domains, try to contact 15 of them, if none responds wait a day. Statistically the bot would get its commands in a 2-3 days (I don't really remember exact numbers so this example might not add up). Well, in order to stop the botnet you'd need to register all available domains out of those 100. So, they were doing just that for some time. They practically blocked the owners operating on the botnet. But they couldn't destroy it. Because that would require manipulating with data on random peoples' computers without their consent which you simply can't (legally). And I think it should stay that way. So anyway, they left it be and owners took control back. But what can be done? You have to run your operating system updated. Having AV software (which is quicker in updates and act as a prevention) doesn't hurt either. And as this is not a real option for a some time, this is a good way. You destroy it in illegal fashion. But no official organization can do that.