I am certainly not oblivious that Google and others take liberties with our privacy.
Facebook needs to be called on the carpet as well in my opinion. I can willingly share selected pieces of my personal life with people of my choosing, but why on earth does Facebook keep installing a tracking cookie in my browser to cache my data. I can delete virtually all cookies on my system, restart Safari and immediately the fbsdn.net cookie is back. How and why does this even happen? I am not on the Facebook site, I am doing nothing related to Facebook whatsoever. There is no need for a Facebook cookie whatsoever EVER.
I rarely go on Facebook as a rule anyway and I share very little. The same goes for Linkedin. I won't touch Google+ and avoid anything Google whenever I can. I think Google and Facebook are two of the greasiest "services" companies around. It's not that I don't think that Google does some pretty cool things, because they do. The fact remains that I'd gladly pay for some of their services, provided they not harvest anything from me. Ever. I am not comfortable selling my soul for anything that they have to offer. Google intentionally circumventing Safari privacy settings speaks volumes.