I do not think DRM is evil. To me it's just an annoying inconvenience that the major sellers of e-books have chosen to put in place to address what they at least perceive as a problem. That is the loss of sales due to sharing of multiple copies of a single purchase.

Personally when I purchase an e-book I do not buy into the idea that I am really only purchasing a limited license to view the book for a temporary period on one specific device. Therefore I always remove the DRM so that the file will always be available to me to view on my current reader, and also on any other device I might purchase in the future from any manufacturer.

The idea that sharing a digital file is different than sharing the single copy of a paper book is valid. The proper analogy would be actually lending someone ones e-book reader with the e-book on it, and with the assurance that they will not copy the file from the reader.