In the Bible we read, "Train up a child in the way he should go, and when he gets old he will not depart from it." Also, "Spare the rod, spoil the child." Yet what I see in the attitude of parents nowadays is just the opposite--in a public place, one where people want to relax and have peace and quiet, I see them running wild through the aisles, jumping, screaming, wrestling with each other, all in front of, and getting in the way of, others. {Not to mention that screaming, which, when done continually, is maddening. {I'm talking about indoor places, with limited room.} {They also get in the way when adults are trying to walk.} Meanwhile, the parents just ignore it all, and from hearing the viewpoints of people like that, I know their attitude--"who cares what others think? They're just strangers, you won't see them anymore, so who cares?" So I think the sin here might be selfishness looking out for "your own," but not caring about others. But compared it to the Biblical statements, like "train up a child in the way he should go," NOT teach them that others are not important, would you say bad parenting--especially when done with selfish intent--is a sin, a sign of the fallen nature? I would say so.
