If it's going to be displayed in an area where lots of individuals will view it (and for a poster of this caliber, it easy to see why someone would consider), it might be best to back it to remove what non-collectors see as a distraction or flaw.
Stephen, you make some valid arguments that are worth being addressed. To answer your question, my plan is to frame this poster as it is and display it in my home. However, even if I was planning on hanging it somewhere where a lot of people could view it, I don't really care if non-collectors consider the folds to be a distraction/flaw. Honestly, I find the notion that folds are problematic rather odd, as they really don't present themselves in such a light to me. I also think that restoration of any kind (including linebacking) should always be avoided unless the integrity of the poster itself is at great risk of destruction.
I do agree with your point about the necessity of sometimes buying a poster that is backed, as it can be difficult to find a particularly rare poster in folded condition. I used to have a strict rule about not buying any paper that was linenbacked, but I have relaxed that rule a few years ago so that I could finally get my hands on a particular desirable item. I now occasionally buy backed paper but only for larger sizes, as I feel that having the backing can be helpful in keeping a large poster together thus making it easier to display than a folded copy that comes in 2 or more pieces, but to this day I still refuse to buy any OS that are backed. For example, several years ago I purchased a backed 6-sheet for Revenge of the Creature as I couldn't find a folded copy, and the fact that it was on linen made it a lot easier to display when I had it on my walls.
When I do decide to buy a poster that's been backed, I always try to find an example that hasn't been retouched, or where the folds haven't been airbrushed. Coming from a museum background, I have a very conservative approach to restoration and will always favor an unretouched poster with visible defaults to a flawless version that's been tempered with. That's just my opinion and I realize a lot of folks might disagree, but since I collect mostly for myself, I feel that I'm entitled to my preferences.
