TY JOUR TI Countering the involvement of minors and youth in extremist criminal activities (using the example of Saint Petersburg and the Leningrad region) KW extremism KW minors KW youth KW involvement in destructive activities KW social profile of an extremist KW digitalisation KW information influence KW countering extremism KW Saint Petersburg KW Leningrad region JO Russian Journal of Deviant Behavior AU Il'in, I.S. PY 2026 IS 6 PB SAINT-PETERSBURG UNIVERSITY OF THE MINISTRY OF INTERNAL AFFAIRS OF THE RUSSIAN FEDERATION