@ErikUden Not only are they already building the infrastructure for this; they're already using it. It's now been over a decade since Amazon was caught remotely purging copies of Orwell's 1984 and Animal Farm from Kindle devices...

https://gizmodo.com/amazon-secretly-removes-1984-from-the-kindle-5317703

And not just the book itself -- they also removed notes people had saved to their devices about the book.

They've promised they won't do it again though! ...unless they have to, or they think it's in the customers best interest, or they don't get paid enough for the book, or if the customer agrees to it (potentially buried in an EULA or some other nonsense.)