Anyone else infuriated about moms who hand their kids anything?

This question stems from my 5 sisters and thier kids, whom they spoil all in their own ways. Example: I allow my kids each a xbox, but I play myself and only allow them to play what I know personally has nothing I would disagree with as a parent. Meanwhile, two of my sisters hand thier 6, 10, and 11 yo kids any game without even checking the rating. Another example: siblings, that one child cant have a birthday present without the other having one as well, despite it not being the other child birthday. I am 100% on the "my child is my responsibility" boat, and I feel the actions my kids portray are my fault, because to me, they are.