In the article the analysis of the communication strategies of network agents is provided. Also, the characteristics of their influence on the dynamics of mediatization of a local incident as an event that touches upon the basic needs, interests and/or values of public groups are identified. As a protest case was chosen a situation concerning the construction of a temple on the place of a city park in Yekaterinburg (2019) in the period from 03/19/2017 till 05/07/2019. The purpose of the study is to identify radical communication strategies and tactics in the social network VKontakte, and to specify types of the calls. The authors identify the generators of radical posts and reveal the degree of radicalism of the published calls based on the speech characteristics and an assessment of the involvement degree of supporters and opponents in the protest discourse. The analysis of their quantitative and qualitative characteristics is carried out. The research methodology consists of identifying communication strategies and tactics of network mobilization through qualitative undirected content analysis of posts and comments on the topic of the analyzed incident.