No because it's not fair to the children nor the parent. Also I knew that if my parents or my ex's family allowed my children to either have something I didn't want them to , allowed them to watch a show I felt wasn't appropriate or to break one of the rules I set forth I would be upset and felt it was disrespectful to undermine me to my children. I feel it's important for grandparents to respect the wishes the parents have set forth. You may not agree with how they choose to raise " their " children but that isn't your choice. You've already raised yours, let them raise raise theirs.