Nowadays we are witnessing a massive usage of social networking sites (Facebook, MySpace, etc.). Those systems facilitate user interaction; however, they disregard users' wellbeing because users are forced to trust the network and to use the system without any guarantees. We consider that this is unacceptable in systems where users build the success of the network. In this work, we propose to study how to improve users' trust in the system in terms of reputation, privacy and satisfaction. Despite former separate studies, we argue that these notions are strongly linked and must be analyzed in a correlated way.