Being a parent does not give you an excuse for bad manners.
The hazing experience and then the subsequent participation in the group forces its members to maintain the status quo and traditions at all costs. It demands mindlessness and unquestioned loyalty, resulting in boring people who have little ability to think for themselves or have an opposing viewpoint from those who have the most social power.
In my own family, my mother had my sister when I was 15 and for various reasons, I was extremely involved in raising her.