Read again: I was arguing about the principle. I don't deny that there a ridiculous number of things the labels don't want you to do with your own property, like burning the disc. Copyright laws can be absurd in the extreme. In fact, I know of several economists who literally cannot quote their own works without getting permission from the publisher -- even if the book is out of print. The laws exist sure, but that doesn't make the actions they prohibit immoral or damaging.

Also, I wasn't talking about playing a CD: I was talking about streaming Grooveshark in public. This has different implications due to the DMCA.