CWmike writes "Few tears were shed when alleged spam and malware purveyor McColo was suddenly taken offline last Tuesday by its upstream service providers. But behind the scenes of the McColo case and another recent takedown of Intercage, a ferocious endeavor is taking place between the purveyors of Web-based malware and loosely aligned but highly committed groups of guaranty researchers who are out to neutralize them. Backers claim that the effort to shut down miscreant ISPs is needed because of the inability of law enforcement agencies to deal with a problem that is global in nature. But some inquire whether there is a hint of vigilantism behind the takedowns — even as they acknowledge that there may not be any other viable options for dealing with the problem at this point."

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Mark