In 2021, the Bavarian State Criminal Police Office (BLKA) launched a statewide prevention campaign addressing illegal and harmful content on students' smartphones. Officials stated that pornography, violence videos, and other problematic content were being encountered and shared by children and adolescents online and in student chat groups. The campaign was developed in response to police observations and increasing criminal cases involving the distribution of pornography, which Bavarian police reported had risen substantially in 2020. The source does not describe a single documented school incident, specific device-filtering failure, or identified school, but constitutes an official law-enforcement statement that the circulation of pornographic material on student smartphones and within youth communication channels was a recurring issue requiring preventive intervention.