The only way possible to download the whole FB social graph is to get permission to do so from every FB user. People can scrape public info but the social graph allows access to a users friends, friends of friends, likes, comments, checkins an so forth.
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The only way possible to download the whole FB social graph is to get permission to do so from every FB user. People can scrape public info but the social graph allows access to a users friends, friends of friends, likes, comments, checkins an so forth.