No, not really. I said it for the same reason racists might use your example. To demean that group and to prime people who don't identify with that group to look down on the behavior.
What is it with old people and their complete inability to understand Anonymous? If you did that, you wouldn't be acting like "them", you would be part of Anonymous.
I think you missed the whole point of the book. If you were a gamma, you would like being a gamma, and wouldn't want to be an alpha. The only reason you feel the way you do now from the outside is because you are pretentious enough to fancy yourself an alpha.
That's subjective. An objective fact is that it still exists on non-MS platforms, it's interoperable across platforms, and there hasn't been a "Skype 2" to replace it on MS platforms only. If that same holds true for Minecraft, that allays most of the largest fears people have.
Integrating with their non-games services seems far more likely. Server hosting, voice chat, mod development, etc can all push people towards MS products.