No need to waste: sell that space to advertisers, and run continuous ad crawls in them; maybe charge slightly more for the space at the bottom.
A warehouse club employee said that the returned TVs are, almost every single time, due to "issues" like that -- there are gray bars we can't get rid of, either at top and bottom, or on each end. Those returned sets have to be marked down and they sell them with their display models, discontinueds and such.