Who wants this? Are Google so hopeless in strategy that they have to borrow from Facebook?
I probably misunderstand you, but are you saying that a user should not let her own preferences guide her choices? If she is allowed that small concession, should she not share her preferences with others on HN? I'm not bashing Google, but I am bashing this "desire" that you've articulated more explicitly than most. This user doesn't want to use that sort of suite of services. That's one reason I'm not on Facebook. If there are important strategic reasons to ape Facebook in this fashion, I don't see them. If the reason is more a perception that they have to do something, that's sad.