Yeah, see, for me it has less to do with spoilers in the 'OMG SPOILERS!' sense, but more just in a narrative build sense. Sequels are always attempting to build on what came before it. Even if it's not even necessarily intended to, it's impossible not to. So, quality aside, each Star Wars movie is building, in scope, in spectacle, in new content, upon what came before it. So the prequels are always going to be made with the original films in mind, but not the other way around. The PT always refers back to the OT because, even though it chronologically comes before it, it was made afterwards. The PT was made to be watched after the OT, and George can whine and stamp his foot about it all he wants, but that's exactly the way he made them. He made absolutely no attempt to make them work in numerical order (although, as I said, that would be practically impossible even if he had tried) and every attempt to make them nod vigorously at the OT. Really, you're putting both trilogies at a disservice to watch them in that order because you're taking away from both of them what makes them tick: for the OT, the freshness of brand-new ideas, and for the PT, the context it's constantly making references to. Again, that's just the nature of the sequel business, and why would you watch three sequels before the original film?