This is a non-story for the reasons stated but a story for other reasons. It's standard that widget publishers require to use their widget "as is". That's basically what Facebook is saying. Not only do you not know what any custom modifications will necessarily do but it's a completely valid argument that you want a consistent user experience with your widget. As for user tracking, this is basically an inevitable byp…
Are you saying that the product designers at Facebook want to design interfaces and settings that intentionally confuse users into laxer privacy settings? Turning this discussion into a rather presumptuous smear at Facebook in the face of many privacy failures by Google is rather childish.
Perhaps you're saying Google's privacy missteps were accidental, and thus tolerable. But what makes them more accidental than Facebook's? Bugs are accidental, sure, and are addressed as quickly as possible (last summer my mentor was locked in a room with a bunch of people for a week trying to fix the bugs that came up, and come up with long term solutions). As a result all privacy settings are as explicit as possible--especially with the most recent launch, the privacy settings of every single item is clear.
It is unfair to claim that Google values privacy and demonize Facebook for its privacy-related product decisions. If anything, privacy nuances are what prevented the new privacy features from launching for multiple months, as we iterated on details that an organization that cared less about privacy would have overlooked.
Here's an interesting comparison: Everything Facebook knows about me is something I or my friends entered (i.e. via tagging). In contrast, Google knows so much more about me than I told it. How did it automatically link my Quora, Twitter, etc accounts without my knowing or permission?