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Well, in the same slide deck it talks about how it recorded the users last access location and "the site has a built-in database of school dormitories and halls". Is it possible that the site was able to automatically determine what hall/dorm you were in depending on your network connection?

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Actually yes, now that I looked at dang's link to the same post discussed previously on HN, that's exactly what they were doing: determining dorm/hall based on IP address and other stuff.

So my comment was dead wrong. I'm sorry for assuming that facebook ever regarded its users as anything other than "dumb fucks" that they could track as they please.

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