For the record: I have no objection to a plugin like this existing, or users who know the ramifications of its use utilizing it. I was just voicing my personal opinion that I wouldn't want to see book-
sellers using it to force hyphenation on readers who may not be able to override it. I can't stop them from doing so, of course, but I just don't like things used in ebook creation that takes choices away from end-users (or foils a feature of their chosen device/app that that prefer).
So write one, post one, use it, or don't--no sweat off my back. But ask me if I think book-sellers should pollute markup with a bajilion soft-hyphens just to "game" a particular device/platform, and you have my answer.