This paper addresses the concepts of moral and social responsibility on the Internet in considering the most troubling phenomenon of cyberbullying that results in loss of life. Specifically, I probe the moral and social responsibilities of Internet users (agents), of the education system in fighting cyberbullying, and of Internet intermediaries. Balance needs to be struck between freedom of expression and social responsibility. The tragic story of Megan Meier serves as an illustrative example and some further incidents in which this ugly phenomenon of cyberbullying had cost young life are mentioned. It is argued that all relevant stakeholders need to think of the consequences of their conduct, that Internet abusers should be accountable for their wrongdoing, and that people who have the ability to stop or at least reduce the risk of cyberbullying should take proactive steps, exhibiting zero tolerance to cyberbullying.; Ovaj se članak bavi pojmovima moralne i društvene odgovornosti na internetu razmatrajući najproblematičnije pojave vršnjačkog kiberzlostavljanja koje rezultira gubitkom života. Posebice, razmatram moralne i društvene odgovornosti korisnika interneta (djelatnika), sustava obrazovanja u suzbijanju vršnjačkog kibernasilja i internetskih posrednika. Mora se postići ravnoteža između slobode izražavanja i društvene odgovornosti. Tragična priča o Megan Meier služi kao ilustrativan primjer te se spominje još nekoliko incidenata u kojima je ovaj ružan fenomen vršnjačkog kiberzlostavljanja doveo do gubitka života. Argumentira se da svi relevantni dionici trebaju razmišljati o posljedicama svojih činova, da zlostavljači na internetu moraju biti odgovorni za svoje loše djelovanje te da bi ljudi koji su u mogućnosti zaustaviti ili barem smanjiti rizik vršnjačkog kiberzlostavljanja trebali poduzeti proaktivne korake, pokazujući nultu toleranciju na vršnjačko kiberzlostavljanje.