Social networks, algorithms, AI: how can we protect our children and our brains?

While more and more countries are considering banning social networks for the very young, and Meta and YouTube are being accused in the US courts of ruining teenagers' mental health, WhatsApp is announcing a feature... for those under 13. So how can we protect young people once and for all from the destructive appetite of GAFAM? Beyond youth, what damage are algorithms and AI doing to our brains? And why are we letting them?