It also gives the false impression that the reader doesn't support DRM, which might scare off potential buyers. DRM does have its uses (library ebook-support) and, like it or not, will be an intrinsic (and necessary) feature of ebook readers for the forseable feature; so devices without DRM support will be seen as less desirable.
Lately there've been a couple of odd queries as to whether the PB360 supported DRM'ed content at all; looks like we now know why...
This harms the brand so I would expect those folks to hear from Pocketbook Global shortly.