Is the tree of knowledge of good and evil not like a loaded gun? A weapon is a definition given to describe that which can cause harm is it not?
Just a quick point. They were told by God to not touch the tree. They understood language, and they understood the commandment of God. It's not like Adam and Eve were young children. Remember, Eve knew that God had told them not to touch it - when the serpent was talking her into it.
So the warning was there, unlike a loaded gun a
child has not been told about. I suppose you could say it was a waiting loaded gun that an
adult WAS warned about.