That's kinda the problem isn't it? When animals escape their property and kill people.
And when someone is dead, they tend to stay that way. So if you "make a mistake" and my kid is dead, just who do I see about that?
I had a neighbor once who told the story about his earlier neighbor, the one with the two large vicious dogs. He asked the nieghbor if he was confident that the dogs would never get out and attack his children. The man said he was willing to bet his life on it, to which my neighbor responded, "Good, because you just did when you brought those dogs here".
Just a story, who knows if it is true or not. But it is irrelevant to me because I agree with the basic concept of it. Freedom comes with responsibility. Sometimes the ultimate responsibility.