I just ran across this article on PCWorld
How to share your DRM-free ebooks with Calibre
The author describes how to set up caliber 3.0 server to share DRM free books. So far, so good - but there is a serious problem with the article. First, the subtitle is "Set up a public ebook lending library". Second, his procedure does not password protect the server. Third and foremost he leaves the distinct impression that DRM free equates to public domain.
The article accepts comments only on Twitter and Facebook and I am not inclined to join either just to post my comment there. If anyone here agrees and has a Facebook account perhaps you could say something.