Re: Now you know you can blame the FBI if similar things go TITSUP in the future? *
For some applications for warrants in the UK, magistrates courts are used, but often the applications are, or were, on paper, and the magistrates have so many to sign that they often do not read each one*. Higher courts can also issue warrants, and I suspect that in the USA, an application for a warrant to delete malware from privately owned computers without the owners' knowledge would have to be provided by a senior judge, particularly if it applied over several states.
I do wonder, however, what evidence the FBI said they would use to ensure they were only accessing the correct computer systems, and what records they kept of the justifications for each system and what they actually did. I suspect that the System Administrators of the affected systems would be most interested to know. Off course, it could be covered by the MS licence agreement small print, after all, who reads that?
*A family member was a lay magistrate and was often confronted with a pile of warrant applications from the police to sign quickly when she turned up on a Monday morning.