Dynamic characteristics of social networks users' behavior represent the toolkit for diagnosing the character and orientation of cyber communication. This study aims to analyze the communicative behavior of youth after transitioning directly from direct communication to communication via technology for the purpose of defining opportunities and determining manipulation potential on communicants. Sixty-two (62) active participants of social networks were selected to answer the questions of the questionnaire. Further, on the grounds of the provided statistics of their accounts, quantitative characteristics of dynamics of cyber communication of participants' communicative behavior were analyzed using descriptive statistics and criterion of Spearman rank correlation. From the results, decrease in the level of intellectual communication of the youth in cyberspace provides a high level of the youth manipulative availability in social networks. Hypotheses about measurability of dynamic characteristics of cyber communication, as well as the communication vector shift from small groups into big ones were confirmed.