I actually have no problem with DRM as a means to protect intellectual property rights to prevent others distributing free copies of copyright material. What I object to is that if I buy an ebook from Sony I can view that on a
Sony ebook viewer, but not on any other device. So if I replace my Sony with, say a
Kindle, I have to buy the same book again. If this keeps up with each ebook viewer manufacturer having a proprietary format for ebooks that can only be viewed on their device it will severely restrict the growth for all.