Аннотация:The article explores the psychological aspects of the constructionof a person’s personality in social networks and how the environment builton the Internet affects the behavior of an individual. The main purpose ofthe study is to identify the patterns between F. Zimbardo’s experiment andthe established relationships of people in social networks that contribute tothe manifestation of destructive behavior. The authors used such researchmethods as observation, comparison and data analysis. The result of thestudy is the developed recommendations that can help in solving theproblem of spreading negative atmosphere on the Internet.Keywords: Lucifer effect, social psychology, destructive behavior, socialnetworks, negativity on the Internet.