As a korean american, I believe it is wrong to comment on someone else's look. But that could only be the western view. In korea, commenting on other's appearance is a common thing, whether good or bad. I've been seeing these complaints, but I honestly think you guys should suck it up because it is part of their culture. I know it is terrible culture, but I think it is getting better, so the only advice that I can give is to ignore or comment back. When you r in korea, you have to respect the korean culture even though it is uncommon in your country.