Online, a predator takes between 19 seconds and 45 minutes to approach a child, according to the director of the Observatory of Digital Violence Against Minors. Faced with this threat, some citizens have decided to act. They register on social networks and create the profile of “digital” children. In the eyes of the people who contact them, they are between 12 and 14 years old. But behind the screen, there are adults who work to identify and report potential predators to the justice system.