As if you didn't know about the amount of data farming that was already going on, this is just the stuff they admit to holding.
http://europe-v-facebook.org/EN/Data_Pool/data_pool.htmlThe complaints page also shows stuff that Facebook are doing with your data that you probably didn't know about, like harvesting your data from other users (e.g. if they sync contacts on their phone). And all of you who like to "check in" everywhere you go; Facebook are building up a pretty accurate picture of your movements.