Hmmm... well I for one know that some outages can be caused by critical staff of that do things that can not be delegated to other people. The system administrator in places where is only one, which probably means everywhere except vast outfits, is a prime example. Where this means me only I know the root passwords (and how you do things once you have a root shell).
The skype people might have imagined that rather few people understand that sort of problem and looked for another reason.
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