Tocqueville was right : America would be ruled by the public opinion. Facebook connects anybody to his/her friends & relatives, but social networks strengthen the fencing of society. If thousands circulate polemics, the audience will become more frightened and aggressive. Trump's victory reveals an editorialization factor which had been covered by the Facebook's owners & users euphory. Lacking an appropriate framing for a democratic conversation, the social grouping is a caricature for social life. Facebook is just beginning to act. To avoid becoming Fakebook, the company must adjust the freedom of expression to professional editorial processes and a stimulation of civic initiatives, as well as assuming an accountability which was previously out of its scope.