Good discussions about copyright control

Over at The Digitalist blog there is a very good discussion about eBook DRM. Cory is excellent as usual but the highlight must be Clay Shirky's quote:

You say “I’m a strong believer in the rights of creative artists to control the distribution of their copyrighted content.” Sure, why not? And while we’re at it, we can be strong believers in breathing under water, or living to 130. Those ideas are similar to the idea of controlling distribution, in that there are a whole bunch of people who think they would be really really great. They’re all similar in another way too. Can you guess what it is?