Trouble is, some parents can be at peace with breaking their child's arm. I'm not. Should I just say "hey, cool, you're at peace with it"?

Forr me, I dislike CC. But then I dislike girls head-to-toe in pink. And I dislike Phil & Ted prams. Doesn't mean it is always wrrong.

However, leaving a child to CIO for hours and leaving them soaked in their own vomit...neglect. A one-off can be a mistake, doing it for a long time or with a very young child... I would ask why the parent wanted to do that. Because I don't agree with neglect or abuse. (And FWIW, my mother believed that co-sleeping was a form of abuse and did tell me that. I disagree. You are welcome to disagree with me, but it may not change my mind.)