I call it negative design, it's sort of like hostile design, without the social nonsense attached. I don't know what it's called in UX or UI terms though, I'm sure it isn't negative design.
A good example of this design pattern in use is ellipses. Not only do they allow you to save space by placing extra actions within a drop-down menu, but they can be used to hide actions that designers don't want users to easily use.
Another example, would be placing the "Delete Account" button deep within the settings pages. Or placing the signout in a drop-down menu (a la Facebook).
Question: What is the name for this way of designing?
Finding articles that describe this could be great.
The best I've got right now is "dark patterns". It's scarily close honestly, but curious what your thoughts are.