Just because they’re mafioso doesn’t mean they mistreat their children.
It's not about child abuse, it's about ending the intergenerational crime cycle. Though depending on your viewpoint it could be argued that raising kids by grooming them to be crime lords is a form of child abuse in itself.
I would think that the doing something would be breaking that bond by arresting the parents
From the article:
Now, almost every member of the girls' immediate family is in prison: both of their parents and three of their four brothers.