At the risk of being flamed, I will say that during the four years I lived in Chile, I noticed a lot of 'permissive parenting'. We learned never to go to a restaurant on Sunday because it would undoubtedly be filled with kids running around and screaming.
I think that there is much more tolerance in some cultures for what is considered 'normal, childish behaviour'. Other patrons didn't seem to be bothered by the kids running around, and in fact seemed to enjoy the chaotic, 'family-friendly' atmosphere.
I will say that while the smaller children's behaviour often fit my criteria for 'spoilt brats' and made me cringe on a regular basis, somehow these kids turned into VERY well-mannered, respectful adolescents.