Why DRM is bad

This is why DRM (Digital Rights Management) technology may not be such a good thing. This guy has posted on his blog that his friend spent US$172 (woo!!) on an Adobe Acrobat book, and when he upgraded his Acrobat Reader, he now can't read his book. A useless file costing him US$172 now sits on his hard disk. Seems like contacting the publishers is all in vain too. Here's his conclusion:

If copyright issues regarding ebooks are so complicated that honest customers cannot access their books, I don't think ebooks will have any success among scholars or students in Norway.

Maybe it's time someone wise up to the fact that DRM may not be the best way.