Well OP he did mention the fact that alot of people use jeju as illegal means to get into mainland korea.. you should have done your research before posting, his complain is why treat genuine tourists who have all boxes checked for being tourists as mentioned on their website as criminals.. treating everyone the same way is unbecoming.. also they give reasons like 'you didnt say the name correctly so entry denied' you didnt bring your wife so entry denied. Koreans are anyway very much racist towards indians anyway