I don't have any problem with that. Maybe it's because I'm not a very sensitive type???
beside - I don't see anything wrong with that because if the person is very curious about Korean people.. why not let him create a thread about it? I am very very curious about blind technology and what you and other ADers explained about it wasn't good enough. I wanted to see it in person and try it out. It's all related to my career because I specialize in Information Technology/HCI/Information Visualization.
the world's too big of curiosity and people are always curious - from trivial thing to embarrassing thing to etc. Like... the part where they're curious about how the blind person knows when to stop wiping his ass... or if it's true about Koreans eating dogs regularly... so on.
That's how I learn so many cultural differences... like my college roomie telling me about how he wipes his ass because it's how it is in Middle East. Which is why it's very offensive to greet people with left hand and I greet people with my left! :-o so I keep in mind to use my right hand when greeting Muslim people.