oh, now i know what you mean.
but being called a weeaboo is definitely a degrading term since you're not just obsessed with anime, but the country of Japan in general and everything in japan. i for one, am glad i live in america (i dont like some of the politics in japan) and there are a lot of better looking girls here prolly. when you look at shadow moth, well he fits the description of weeaboo quite well. he told me flat out he's a japanophile and couldn't stop talking about the cuteness of the girls there. also, whether or not he uses random japanese words in english sentences is irrelevant since a lot of his posts will just have japanese characters for no reason when he knows full well 99% of people won't be able to read it.
me on the other hand, i really like anime and manga and have japanese characters in my personal title (says strength of steel btw) cus I'm learning the language. i dunno if i'm obsessive enough to be called an otaku, but in no way am i a weeaboo.
even kizzu-kun said there's no way in hell i am, so that's enough proof for the universe, obv.
i hope this spread some light on the issue for you.