Indeed, this mode mainly affects very young boys from 7 to 10 years old, who normally have neither smartphone, nor even legally the right to access platforms like Youtube, where Google has made many reports, according to the authorities. In the same video, the police also specify that the person whose smartphone was used by the child to show his sex is legally responsible before the courts.
Because obviously, grasping this kind of image is repressed by law. The police fear that this challenge will be a boon for pedocriminals, who would see a golden opportunity to recover illegal content, simply surfing on the internet. So if you have young boys around you, keep your eye open!