When has *this* been confirmed?
Alas, it is Bethesda style. Look at Fallout 3.
2 things:
1. It was confirmed by Pete Hines and Todd Howard via interview and twitter posts many times that dragon attacks are random and CAN happen at any time TO THE PLAYER specifically. This says nothing whatsoever about how dragons relate to towns/cities in any way.
2. Strange question, but I find it prudent....Why does everyone posting about children assume they won't die??? I can see that finally there will be some realism to TES in Skyrim by having children in the world, and a huge part of that will be involving them in quests both good and bad for their general well being. I find that with that inclusion alone, our motivations for quests involving children should be that much stronger and the story that much more powerful. I mean, what motivates you more? For instance, killing the random dragons that attack ONLY YOU out in the wilderness? Or killing one specific scarred black dragon that has been rauaging Whiterun for months and has killed/eaten/burned to a crisp many men, women, and young defenseless children???
Aside from that however, please note that I am in favor of dragon attacks being major quests and/or possibly random events that can be stopped from being repeated by killing a dragon that has been owning a specific town. However, how this will play out in-game has yet to be confirmed/denied.