Nothing pathological or irrational here. Facebook has a track record of trying to trick its users into revealing more information about themselves than they want. Sneaky TOS changes, anyone?
More facebook in the lives of everybody = road to dystopia.
Unless of course, you think privacy is bullshit. Then I'd recommend a book on European history (1850 to now).
I think many peoples' issue with Facebook is that they have proven themselves to be untrustworthy on numerous occassions. They're constantly moving the goal post on user privacy with and without consent and they don't treat business users much better.
It's not surprising that people who care personally about Oculus would not be happy with the Facebook acquisition. Especially since the gaming community has a very strong aversion to the toxic social gaming landscape that Facebook was/is host to.
I really, really don't understand the pathological and irrational hate for Facebook and/or ads.