What’s the worst case of bad parenting you’ve ever witnessed?

I was a bellman at a hotel and very early in the morning I was called up to help them with their luggage. I was met at their open door with the dad, mom, two 12ish year old girls and the nanny. The dad was a really big guy and was in a bad mood, the two girls were laughing and giggling which made the dad even more angry because it was early and wanted them to be quiet as we load up the bell cart with their luggage. After the girls wouldn't stop goofing around, the dad started to push the mom and nanny out of the way to make room for the cart, when actually he took a step back, and, like a pro soccer player he kicked one of the girls as hard as he could right in the middle of her back. Everyone shut up after that.

/r/AskReddit Thread