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One user of Facebook managed to collect and seed on the torrent networks over 100 million users' public data; data that is available for 'everyone' to view. This caused outrage towards Facebook, with many realising the scope and breadth of how much of one's personal data is made accessible by the site.
Arguably, though the data was seeded to torrents, the data was available to see on Facebook without a username and password to even access the site. But it caused enough of a stir for Facebook to readjust its privacy settings.
The privacy settings were mapped out by the New York Times and became increasingly clear how very difficult it was to not only edit one's settings but let alone to find the setting one would want.
Facebook was hammered by privacy groups and governments alike to change this, and eventually did earlier in 2011. Nevertheless, some question whether it is in fact smaller in size and simpler to read, or just broken up into smaller sections giving the illusion that it is more concise.