I have found another petition that has got more attention than mine (probably my objectif is too high). They have already 55.000 signature, they need 20.000 more. 

https://act.campax.org/petitions/schutzt-unsere-kinder-likes-sind-kein-kinderrecht-social-media-erst-ab-16?source=rawlink&utm_source=rawlink&share=0c16e59d-aace-4b8b-8c55-94db13aed81d

their website is :https://www.nextgen4impact.com/