This view receives initial support from the fact that some -ed adjectives (used to) have forms with and without be-: booted/bebooted, ringed/beringed, gartered/begartered, etc.
this null beprefixation analysis seems to be limited in its empirical coverage and work only for cases involving bare nouns, i.e., when the nominal base is simple in form, and it is not at all clear how this analysis could handle fair complexion and other modified nominal bases, as given in (2).