English- Public Enemy no. 1 in Korea

One time when  I was on my way to Seoul coming from Jeonju on a train, I remember that I was so busy that time because I was so thrilled trying out my new phone because of it's feature called DMB (Digital Multimedia Broadcasting) so I was swtiching channels and I was listening to the radio when suddenly a loud voice just interrupted not only I but almost eveybody on the platform where I was. There was this lady who was on the phone speaking so loud that I can hear every word that she utters even I was about 5 or 6 meters away from her. Everybody was staring at her and making faces at her implying that they want her to stop speaking too loud but unfortunately nobody had the courage to say so. However, what I found strange that time is, that situation is just common in Korea wherein almost (not all) everybody speaks too loud on the phone wherever they are. Whether they're on the train, bus, bookstore, gallery, museum, etc. even in the library. But why were they so annoyed when the lady on the phone behaved like that? And then, I found out that if you speak Korean loud on the phone...it's acceptable in Korea, but if you speak English loud on the phone...it's destructive in Korea. By the way, the lady on the phone was probably Korean but Americanised.
Another situation which I find funny is when I or my friends around me or just the person I am actually speaking with speak English. Most of the people around us normally look at us strangely. Sometimes I can read their facial reactions saying, 'Why are they speaking English?", "Why don't they speak Korean?", "Okay, you're well at speaking English, I know!", "You're English sounds strange!" and others. I don't really mind those reactions but sometimes it can bother me when I'm with a Korean friend because my friend normally avoids those things and tend not to speak English for a while until nobody's around us anymore.
There are also other situations where Koreans dislike the use of English or just English itself such as when taking a test or going for an English interview but I think those are only natural.
But this year, (or maybe this semester), I have this one observation which had shocked me most. Uhmmm...I don't really have any personal feelings on this one but it's just plain observation. I have observed two Korean (-) students who speak English very well, although they are not very fluent, but they speak smart and confident. But then, I think this skill somehow made them act a bit rude like ignoring others who can't or don't speak English well. I didn't really know that someone can be that proud speaking a second language.
These situations can only be felt strongly in Korea, I have been to other countries but this never actually became an issue. Well, if they were...I haven't heard of them yet.
Although Korea tries it's best to become globally competitive through learning the English language, I think their attitude towards English should also be given attention.^^