Basically, it's possible that these parents dropped the ball from day one, only to have the problem blow up in their faces a few years down the road.
Thank you, and well done liberal parents!
In order for discipline to be effective, it must be consistent. In other words, the parents must be disciplined in order for them to instill any discipline in their children.
My wife and I use the same methods that have worked for thousands of years: consistently reward good behavior and punish bad behavior. If applied consistenly, ie, with discipline, it works every time.
Agreed, strong and consistent discipline from birth means you don't have to really discipline them as much as they age, they understand the rules, boundaries and consequences for their violation, so you don't need to spend as much time on discipline later.
Do they still mess up? Sure... are there kids who are going to challenge authority more than others? Sure. There are no guarantees, but its been my experience, spare the rod spoil the child is an absolutely true statement.
I'd rather my kids understand from day one, you are responsible for the actions you take, and all actions have consequences, good and bad. They screw up and need punished, they understand exactly why they are being punished and know a punishment is coming even before I do. In fact, I make them repeate to me exactly why they are being punished before the punishment is laid down, because I want to make sure they fully understand what cause caused their fate, and reflect on it.
Fortunately, its worked quite well, don't need to punish them often at all, because they understand how it works.