It's really fun teaching some of these kids, I can tell you that much!
Mum is often not fun to pop a phone call into, either!
Lots of denial and 'not MY child' and 'what had been done TO THEM to make them act that way' etc.
Generally an all round pain in the arse.
Schools absolutely rely on punishments, especially secondaries. Try passing an Ofsted inspection without a solid behaviour policy that is effective and adhered to by all!
I agree that the softly-softly, meekly spoken, 'now, now, darling, let's talk about your feelings' brigade can absolutely set their kids up to struggle later on.
I do accept that these people are genuinely not parenting in the way the method is designed to be, though.