Comparisons of downloadable books and music to their ancient, tangible predecessors are an old, old meme, but sometimes the comparison applies.
Source: Here’s Why Digital Rights Management Is Stupid And Anti-Consumer – Consumerist
The pirated version (and there is ALWAYS a pirated version) already has *FREE!* going for it. Do you really want to add “Less of a hassle to obtain, easier to use, and safer/less spyware” too?