That's true (I'm actually working on an ebook generation library that does PDF, ePUB, and MOBI), but most books that most people will read on the Kindle do have

That's true (I'm actually working on an ebook generation library that does PDF, ePUB, and MOBI), but most books that most people will read on the Kindle do have that DRM. That's what I meant by DRM restrictions on the Kindle. If it sounded like I was saying that the device itself forces DRM, that's not what I meant.