This is silly. Just rip them and give them away. You'll spend less on mirrored hard drives than storage for the disks. And you can always BitTorrent movies you already own on DVD/BluRay guilt free.

The only reason I still have my stack of disks is because I haven't had time to rip them and their special features yet. That and we keep the disks for kids movies because the van doesn't have streaming support or AppleTV yet. :)