Looking back, I have mentioned DRM a few times, and how I don’t like it — it’s only there to let other people be able to control what we can do with stuff we buy for ourself. And to extort as much money from us as possible.
While the thought behind DRM may be well meant, all I’ve seen of it is misuse. One other thing that is good, but made bad, is the misuse of copyright. How long should the copyright period be? 20 years? 50 years? 50 year after the death of the creator? The age of Mickey Mouse + 50? Infinite?
The companies that owns copyrights seems to want to constantly extend the copyright period, both to protect their old work from being used (and appreciated) and to prevent others to create new work that may use bits and pieces of their copyrighted work, intentionally or not.
Now, the best stuff I’ve read about this problem with copyright, is an old short story by Spider Robinson, Melancoly Elephants. Best of all, it is now available on his web site, for free! I recommend you to go read it right away.