If there's not much talk about it, you will use it more. Social Networks are the current fashion, and not just among young people. Names, sexual preferences, music, film, friendship, love picture video. A wealth of information, a potential gold mine for marketing agencies but also a gold mine to the Ministries of Interior. When we saw for the first time Facebook, we thought, with a wry smile, that was the work of the Central Intelligence Agency. In fact, Facebook, container par excellence of this precious mine of personal information, may seem like the postmodern dream of a dictatorship of the last century, detailed views and preferences of tens of millions of men kept up to date, in the hands of whom? To be continued.