Maybe not -- maybe you know something about how Apple operates. But clearly they ARE sending responses threatening to do exactly that.
Anecdotally, I have never heard of this happening in non-malicious cases, ever. And I know a couple hundred Mac and iOS developers who would raise a lot of noise if this did happen, so I'm inclined to believe that it doesn't.
There is a good reason for how Apple approaches use of their private APIs, and for how Microsoft approaches use of their private APIs. Not saying either one is correct, there really is no answer, but consider that for any public API that exists, there may be undocumented details that some software somewhere relies upon whether they realise it or not. Apple is just taking a more aggressive approach than Microsoft here by detecting and disallowing private API use in their store so as to avoid issues down the line.
[1] https://tedwvc.wordpress.com/2013/07/19/finding-the-kernel32...
They don't, though. And we trust them not to, because it is not reasonable behaviour and it would absolutely not make sense for them to do this.
This is the same.