I never expected it to continue into adulthood. The two wangdda are not bullied, but they are completely ignored. While this ought not generally be a problem, it is whenever I require students to do group work. I would assign these students into groups, but find that the other students completely ignore them. Once the groups had to do presentations and I think I heard this one group actually telling the one student not to come to class during the next class. I might be mistaken because my Korean is not that great and I wasn't standing close to the group when they spoke, but that is what I thought I heard. It is a big challenge to teach a class where such covert ostracising is occurring, especially a skills oriented class like Conversational English that constantly require pair work and group work.
In an individual society it is difficult to be ostracised, but individuality is often celebrated so that once you are an adult, it becomes okay. I remember that in school I was sometimes ostracised for being the weird, sensitive, artistic boy. As I got older it became easier, and by the time I went to university I found out that there were many other freaks just as weird as me and I made a great group of odd and creative friends. In Korea it is different. There are not that many subcultures and students that stand out as individuals are actually quite few. In fact, I often encourage and compliment any students that show originality and uniqueness, since these are values that I treasure and are probably undervalued in Korea. There's a famous idiom in Korea: The nail that stands up gets hammered down. I try to build up those lonesome nails; hopefully they'll survive the hammering if someone valued them enough.
Read more about wangdda here,