According to an article in today's Yonhap News, it is now illegal for Koreans to marry Cambodians due to fears of human trafficking. The Cambodians had made brokers illegal in 2008 which resulted in Korean-Cambodian marriages going from 551 to 1372...guess that did not work.
I find it interesting that they have only banned Koreans. The article says it is because 60% of foreign marriages are with Koreans.
I have no idea why this fascinates me, but it does.