Are you disagreeing that Clippy and Snippy are dangerous? If not, accepting this statement adds no complexity to my view as compared to yours.

As for shouldness, many people don't make a distinction between "rationally should" and "morally should". And why should they; after all, for most there may be little divergence between the two. But the distinction is viable, in principle. And psychopaths, and those who have to deal with them, are usually well aware of it.