I found a web site that mentions the experiences of overseas adopted Koreans that are very similar to Mee Sook and Jessica's comments (see above).
"Overseas Adopted Koreans (OAKs) appear to be a source of shame and pain for native Koreans, some of whom, in turn, place the burden of those negative feelings back upon the OAKs. Out of prejudice and pride, many native Koreans treat OAKs as if they don't belong in Korea and have no right to claim Korea as their own. They should make an effort to understand these children who have been displaced."
¢Æ¢Æ G.O.A.L - Global Overseas Adoptees' Link ¢Æ¢Æ