I see your point, but the guy seems to have a different set of values. When he was asking his marketing department to prepare a series of smear campaigns against Linux and Open Source, for example, I don't think he realized he was doing a wrong thing. In his mind, he was probably saving his company from competition, as he always did.

Also, I think a great momentum of Linux in the late 90s was precisely because people hated Microsoft wholeheartedly, and that was one of the main reasons it didn't die as another toy project. So I'd say yes, a net good for humanity - not because but in spite of what he's done so far.