http://the-digital-reader.com/2014/10/06/adobe-spying-users-...
Adobe is collecting data about every ebook on your system, regardless of whether it's using DRM and even regardless of whether it's even being managed by the Adobe Digital Edition reader. (And for an added security bonus, they're sending it in plain text.) If you install and launch the new version of ADE, it's going to do this whether or not every single ebook you have on your system is DRM-free.
This is certainly an electronic privacy issue, but it's not a DRM issue just because Adobe Digital Editions supports Adobe DRM, and the EFF's headline is a little disingenuous. Adobe's rationale for this collection is indeed claimed to be related to licensing, but the biggest problem is how wide a net they're casting and how intrusive this information is -- ironically enough, if it was only sending this information about DRM-encumbered books, it'd arguably be much less of a scandal. (Although the fifty-eight people in the world using Adobe DRM would still have every right to be pissed.)