In a mature and full democracy, a content platform or a social network must, as far as possible, guarantee the veracity of published content, or at least warn of the potential risks implied by certain publications or sources. Platforms have already adopted a set of measures such as requiring that political and issue ads be clearly labelled and restricting them to authorised users; deletion of fake accounts; approval of particular content and sources; increasing transparency in the process of buying political ads (buyers, amount, content, etc.). While such initiatives – which have been adopted either voluntarily or to comply with the law – are generally to be welcomed, they also run the risk of placing the responsibility of guaranteeing fundamental rights in private hands.