My opinion is that DRM is bad. Very bad. Some more stuff is here: http://defectivebydesign.org/ and here: http://www.eff.org/corrupt/.
I cannot understand this world. By trying to enforce our will, and seeking for our good, the world is converging to a local optimum, as it happens often with greedy algorithms. DRM means extra cost and effor to the content provider, to the manufacturer and mostly to the end user. And what is the profit? The entertainment industry will earn more. But this means only transferring the money from people (ca. 5 billion) to a small minority (1 million?). And what are we paying for??? Yes, it’s an effort to create a content. But what is the difference if I look at it once, or if I make a copy for myself, look at it again, or I share it with friends, and week look at it together. The effort needed to create the content is always the same.
My favourite example is from the bible, just think about it:
Then he took the seven loaves and the fish, and when he had given thanks, he broke them and gave them to the disciples, and they in turn to the people. They all ate and were satisfied. Afterward the disciples picked up seven basketfuls of broken pieces that were left over.
Matthew 15:36-37