I certainly don't care for DRM, but I recognize publishers' right to use it—so long as it isn't backed up by force of law. We can't force anyone to make content available in any particular format, after all. However, most of the effectiveness of DRM (such as it is, which isn't much) comes from the fact that you can't legally talk about how to circumvent it or distribute tools for doing so. Obviously that needs to go; it's an even more blatant violation of freedom of speech than copyright itself.
From a purely technical perspective DRM on books is particularly futile. If the page is visible to a human reader then it can be imaged (perhaps with an external camera) and OCR'd at least as easily as scanning a physical book. DRM for audio files is in a similar position—not quite lossless, but very close. With video there is a bit of quality loss from the capture and re-encoding process, but nothing too serious. It's a bit more effective with interactive content such as games but still far from unassailable.
From a purely technical perspective DRM on books is particularly futile. If the page is visible to a human reader then it can be imaged (perhaps with an external camera) and OCR'd at least as easily as scanning a physical book. DRM for audio files is in a similar position—not quite lossless, but very close. With video there is a bit of quality loss from the capture and re-encoding process, but nothing too serious. It's a bit more effective with interactive content such as games but still far from unassailable.