Sadly not that uncommon. And people wonder why children seem to have no respect for teachers/police/doctors etc. these days.
I've seen a few shocking things recently involving parent and child. Probably the one that stands out was the woman (term used very loosely) trying to pop headphones into the ear of her 7 week old so it could listen to some crappy happy hardcore music from her phone.
She actually seemed to wonder why it was crying.
Really what chance do some of these kids have when they are brought up by parents who can barely function themselves as a member of society let alone try to raise and instill some values in children.