What I can say is that we need to make it much more difficult to infect personal computers here.
If you show me a Korean government or non-trivial Korean corporate website, I'll show you a website that uses at least 3 activeX controls and is optimized for IE6. Most public computers and the majority of personal computers I've used here have been running IE6 or 7. I'll admit that in Seoul and larger cities like Pusan, Ilsan, and Gwangju, you'll sometimes catch people using Macbooks at Starbucks. Score one for security via obscurity, but non-IE folks can't use ANY banking website or government site (National Tax Service, National Pension, National Health, etc).
Even though I'm in the "most wired country in the world", the majority of high schoolers, uni students, and business people I've interacted with aren't more tech-savvy than your average grandma. Everyone runs the dubious AhnLab Anti-virus as a mandatory magical medallion that came with the computer.
We need to do better - Korea's great ability is overnight change on a massive scale. The day President Lee announces that all browsers should be upgraded to the latest version is the day that all browsers will be upgraded to the latest version. Seriously.
Barring that kind of concerted effort, should the day come when I see a non-IE browser or something other than WinXP/Vista on a Korean adult's primary/only computer, I will eat this hat. This one, right here.