so what? for one thing, children can legally play with (though not necessarily "own") guns, bows, model rockets, etc in most states. those all seem as dangerous, if not more so, than lawn darts.
I don't think children should be going anywhere near such things without adult supervision, but completely banning sale seems like a wildly disproportionate response.
The lawn darts were sharp and a bit hard to control. Basically like throwing a giant knife up in the air. Guns and bows have fairly well established training and safety regimes (i.e don't point them at someone), and model rockets get ignited 30' away
But throwing a dart high in the air and hitting a wandering 2 year old actually did happen, and there was no real attempt to only their the darts in one direction
I don't think children should be going anywhere near such things without adult supervision, but completely banning sale seems like a wildly disproportionate response.