Facebook changes the norms for web purchasing and privacy

There’s no global opt-out – no ability to tell Facebook, “Please stop posting my purchase behavior from any third-party sites to my feed.” You’ve got to opt out from each new partner you encounter, either by clicking on the window on the purchase site, or by turning off this “feature” for each partner on Facebook.

I had two reactions when I saw a demo of this feature on Tuesday. One was “Well, that looks like a good reason to get off Facebook.” And the other, hearkening back to my days as the creator of ad-driven user-created-content websites, was “Hot damn, someone finally did it.” Because, of course, this is the sort of information that ad targeting companies would kill for.