I would have gone off my tree!! what an irresponsible parent!! and such a great example for his kids too!
I've been on both sides, my son is 21mths and he's always getting hurt at daycare, bites and scratches, he has now learned to pinch from daycare.
The other day we were at an indoor play centre and he was trying to 'help' another child go over this one part of the equipment so he can go down the slide and his 'helping' was pushing the kid over the part and the poor thing got a little hurt but more upset over the push and i went in and apologised to the mother, she was a lil cranky but thanked me for apologising. I then spoke to my lil one about not pushing and waiting our turn, i don't know how much got through but he didn't push anyone else all day. However not 30 mins later some older children came into the toddler section and were playing quite rough and next thing i know my son is in tears, now he's not one to cry when he gets hurt so for him to be in full tears means he's really hurt, I pick him up to find a scratch down his face starting just under his eye, we didn't see what happened as both me and my sister were feeding our lil bubs but it's not hard to guess, and the parents of these older kids were over on the otherside of the centre completely self absorbed. I couldn't confront them as i didn't know which of the three did it and my son can't tell me so that went unpunished, wasn't very happy about it but what can you do when you don't catch them in the act? At least you got to confront that idiot parent, wish i could've!