I think it would be best to somehow do it in person. If George was at any sort of event/convention, have everyone mail them to one person, who would present them in a box to George.
That would be awesome! But mailing them back would be great too. It's not showing contempt at all; it's giving him accurate results for his little survey he's decided to create. Since he made a couple tactical errors setting it up, I think it'd be great to just make it absolutely clear that we didn't buy the pack for the SE's.
What a great statement that would make, though. I can see the headlines: "Hundreds of Star Wars fans flood George Lucas' mailbox with Special Edition DVD's". That note would be great to accompany it. "Thank you for the original versions of the Star Wars trilogy. It's a shame I was forced to buy the Special Editions as well. Since they are of no use to me, I am returning them to you.
What a statement! But you guys are right; if we do this, we can't go half-way. ALL 72,000 people or however many it was who signed the petiition should mail their SE discs back. Then, it would probably work!