THE IMAGE from FIRS SLIDE IS the cover of the bookSchool Climate 2.0 - by Sameer Hinduja and Justin W. Patchin http://www.schoolclimate20.com/ One of the most common social activities of a teen’s life is that of using social media sites for entertainment and communication, for interactions or gaming, but also for information and documentation. In this paper, we focus our attention on social media platforms such as social networking sites, video sharing platforms or microblogging. The authors will explore teens’ exposure to violence in terms of cyber-bullying, online harassment, digital abuse, sexting / sexual violence, inappropriate content (misuse of social media), cruelty or anti-social behaviour etc. Additionally, this paper will focus on how teens perceive and protect their privacy and reputation on social media, and the extent to which teachers, policymakers and parents are aware and prepared for their role in digital safekeeping and guidance. Special care has to be given to mobile access of social media using cell phones, tables or iPads, for hypertexting or hypermessaging.