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Seeing as you're on HN, I'm sure you realize that those facebook widgets that show up on CNN.com are in fact served from facebook owned properties. The domain in the address bar means literally nothing here. The outsize vs inside facebook distinction is meaningless.

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The context is far from meaningless. While you understand that 'technically' it's the same source, your friends and family using Facebook will have certain expectations when 'liking' something. These expectations will probably be that they like something in the social network context of Facebook (visible to people they know) and not in the context of the web at large (viewable to teachers, bosses, and random strangers).

>and not in the context of the web at large (viewable to teachers, bosses, and random strangers).

But its not. Its viewable to your friends only (who may be browsing a third party site). This information is not made public in any meaningful sense of the word public. Only those who were able to see your like on facebook will ever see it in the context of an advertisement. Hence, no privacy violation.

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