A have a couple of friends who go to Anime Expo every year.
One of them actually has a sticker that says 'Otaku' right on his car.
I thought it was interesting that one of the rooms at Anime Expo last year was called 'Is Otaku Dead in America?' All I could think is 1) God, I hope so. 2) Interesting to say Otaku is dead at an anime get-together.
Myself, I can't stand anime/manga/whatever. I have no problem with those who love it, but some people (like my friends) can be very overboard about it. I guess its a full cultural thing for me. Don't say you want to learn Japanese just because of a cartoon; say you want to learn because of the rich history this wonderful country has, the food, the culture, the fashion, etc. But to say you love all things Japanese just because of what you read and watch off the DVDs is just silly. I'd hate to think people overseas think all Americans are like the dickweeds on 'Jersey Shore' and all the other stupid reality shows we have on TV.
Anyway, if you were not born into the culture or properly taught about the culture, you have no business using the terms and language of said culture. End of story. In reality, I can read and comprehend many languages (I loved foreign languages when I was a child, and still retain it to this day) but I refuse to speak any of them out loud. Why? Its out of respect for the culture. If I don't know your culture fully enough to carry on a decent conversation, I have no business butchering your language.
*Shakes head, picks up and carts away soapbox*