I don't know if I've ever met a weeaboo, but I think I get what one is. There's nothing wrong with liking things, but trying to become what you like, or in this case "wanting to be Japanese because they must be into everything I find so cool over there"...leads to different degrees of failure. I can understand if someone says they are mainly interested in otaku culture or something, but that doesn't represent Japan at all, just a minority. I'm sure because the average American knows very little about Japan, it's probably disappointing for a vast majority of them when the things that become well known about them aren't centered around the more common aspects of their culture.
To be fair, I wouldn't expect someone from Japan to know about the United States if all they cared about was our Comic Con culture or whatever, but if they started acting like that was what everything was centered around, then no it wouldn't be accurate at all.
I agree
You know this topic has really helped me a lot in learning what a Weeaboo actually is as I've heard many different definitions both online and offline.