I am an experienced mother of two who are 18 & 16 now. Never did either one of my children ever try to wander off out the front door. I knew where my children were 24/7 and day and night. It's called caring for your children. There is no excuse for this. My children were interacted with, given a bath, a bedtime snack of fruit and milk, and a bedtime story and they were content. They did not behave like brats either.
When we hear stories of children wandering out the front door there has to be something happening behind the scenes like neglect or abuse.
Parents these days are immature, self-absorbed, and have no common sense. Safety first, nurturing, positive interaction, maturity, and common sense are the key to good child care.
Also I failed to mention that I taught my children at an early age the dangers of opening the front door and to never go out w/o me up until the age of eight. After that they knew to stay in the yard and I had to either hear them playing or see them every 10 min. I supervised them a lot until they were nine and ten, then they knew to check in w/ me. If I had to take a shower they stayed inside the house w/ the door locked until I was done then they could go back outside.
Bottom line is keep an eye ON the children, teach them the dangers beyond the front door, nurture your children so they don't want to sneak away, and supervise them.