So someone has finally put their head above the parapet and stated that parents who indulge or spoil their children are more likely to turn their kids in to unruly trouble makers at school.
It's not rocket science, but it is so obvious to anyone who has been in a classroom.
I have taught many children in my years of teaching who know that they can manipulate their parents and get frustrated and disruptive when their first encounter me or another teacher and find that they must take responsibility for their actions. In most cases teachers have been able to help turn the pupil's behaviour around and have probably been the only person in their life at that point who says "no" and means it.
The greatest kindness a parent can do is to teach a child that no means no and that they will have to work for things, try hard to achieve, and that life will not be served up for them on a plate.