Another thought I just had: if this stuff makes backups impossible, I for one might not buy another BD, but rather rent it instead! If I can't manipulate it to the backup I prefer (no intros/movie only, smaller &/or repositioned subtitles mainly) then why buy it if a rental option exists.
I wouldn't be alone in this; so the "purchase" market shrinks, and might they try to put "rental" shops out-of-business also--hell I doubt it, there are too many Mom & Pop businesses, much less large rental businesses, which would be affected. Hollywood wouldn't shoot itself in that way, would it?