Guillaume Chevillon Published in Le Monde in French on April 26, 2022 The banning of Facebook and Twitter in Russia, which follows the banning of RT and Sputnik on these platforms, confirms once again that social media are not simple agoras where citizens express themselves freely. Instead, they constitute centers of influence subject to manipulation. The upsurge of hijackings during electoral campaigns in recent years should warn us between now and the presidential election.