I woke up in the middle of the night, knowing I had to do some origin hunting.
Here's the blog that started "DO NOT WANT" with images from a bootleg copy of The Revenge of the Sith purchased on the streets of Shanghai.
There is so much Engrish in here, it's a wonder that DO NOT WANT is the line that caught on.
June 7th, 2005.
http://winterson.com/2005/06/episode-iii-backstroke-of-west.html
An updated re-telling of the story:
January 27th, 2009
http://winterson.com/2009/01/episode-iii-backstroke-of-west-redux.html
I'll update the meme entry later today. But for now, back to bed.