Who threatened to harm, or harmed, a child? I am holding my own hand in the same place theirs' is. Nobody is being burned. Someone is more uncomfortable than I am, because it goes past their normal exposure to such things. But nobody is being harmed by anything, nor threatened.
Build your fences and gates, and the child will go next door and burn himself on their stove. "Gee, can't get near the one at my house, fence around it. I'll touch this one."
No different than the street in front of the house, the pool in the back yard, or the guns in a cabinet in the living room. Teach them too look both ways, swim, and know what guns are capable of, and you'll have a healthy, happy, kid, that knows how to avoid things in life that will hurt him or someone else.
Just build fences around them, they're going to be hurt someplace where there is no fence.
I'd rather control the amount and severity of the hurt. There is no doubt, ever child is going to be burnt. Without some conceptual framework within which to process the information, "HOT!", means absolutely nothing.