This issue of the "Privacy and Innovazione" series contains, integrated and updated, the work of Elisabetta Stringhi, who won the fourth edition of Award for the best degree or doctoral thesis on the themes of data protection and innovation. Online platforms allow content sharing to an endless audience. However, with this power comes a dark side: harmful content such as non-consensual sharing of intimate images. Yet, online platforms are often not accountable for cyberviolence, leaving users unprotected. This volume examines policies of online platforms, examining their impact on online users. The aim is to spark an academic and political debate on the legal protection of online users. To do so, it analyzes international and EU laws to explore accountability towards the most vulnerable users. A must-read for those concerned about online safety and well-being.