Comment Spoiler alert (Score 1) 2
Spoiler alert: you are tracked all over the net, and add-ons like Ghostery only partly help. If you don't want that, don't surf the net.
Other techniques could probably link this very post to my person with high accuracy just because of my writing style. So just don't start with the assumption you are anonymous, cause you are not.
As far as the article goes; the 'Porn' keyword here seems more to serve the goal of tickling the reader and triggering the ''i want privacy for delicate things'' mindset. It's sad that only one website replied to his questions and i do agree that their argumentation of ''too much data'' is anything but waterproof. However, it seems they already were more open what they are doing at the backend site, than any of the big toko's like facebook.
I trust facebook less for guarding my privacy than a porn site, after all, the porn site wouldn't want to risk loosing its visitors because of privacy issues, while at FB it is their core business to do so.
Most likely, if a porn site is actively tracking you it's a honeypot in the first place. I agree it stimulates sticking to the big sites and avoiding material that could be illegal, but that's just common sense. I never have had the illusion my prn preferences are anonymous for any interested authority or hacker.