You know, I thought having children be able to dismantle constructions was a good thing. It was weird that they could do that, but they also collect crops so whatever. But I just found a problem with it.
I ended up capturing a couple of drow snatchers and thought that having them just be torn apart by my militia was too boring. So I started building a "Pit of Despair" that i could use to execute captives. Basically I just have it so that prisoners are thrown off of the top of my fortress, then down into a deep pit filled with upwards spike traps to get a nice Mortal Kombat-esque flavor. You can probably guess what happened.
While a child was deconstructing some planks from the top of the pit, the little idiot actually went and stood on top of the floor he was dismantling. Good news is that he somehow survived the fall, albeit with a lot of bruises and by pure luck, he avoided the serrated iron spike that was designed to tear anything that falls down there apart. The bad news is that my pit is not nearly lethal enough if it couldn't even seriously injure a child. So now I have to make it deeper and make the traps deadlier.