They weren't calling about books though, were they?
Hardcore re-readers (who don't already have control of their library) represent a tiny portion of the ebook reader market, I'll wager. Those that will pitch a fit about an ebook they can't re-read sometime down the road?... even tinier.
Could be wrong ... but I don't think I am.
DRM (other than for libraries/rentals) is wrong because DRM is wrong. That a handful of people who didn't know what was going on might get burnt in the future doesn't really add to that, IMO.