I saw this shirt at Singil station last weekend and then saw it a guy wearing it today in Suwon. Somehow, I doubt that they really know where Du Quoin is and it makes me wonder who first heard of Du Quoin and thought it would make a good tshirt. I wish I could get a job designing tshirts in Korea. That would be fun.
Tshirt style in Korea is like nothing else - lots of random pictures of everything from cartoon characters to Hollywood celebrities (that must be the newest way to know that you made it in show biz), and even more random English. To see some examples, go to http://www.engrish.com/. My friend here just got one of her pictures posted on the site (click on Clothing and it's the picture for July 27).