I am taking great offense to this thread... I love anime a lot. Sure, some of it makes no sense with teenage partial nude chicks that are apparently gods when it comes to using guns and fighting monsters. But another half of it has really serious and good shows.
As stated above, that "95% of us are weirdos" is complete crap. Everyone I have ever met who watches on Anime on forums, chat rooms, and real life have been really cool people. Sure, some shows take fan service to a whole new level with some ridiculous crap, but that doesn't stop some of the animes being really good.
Not to mention half of the animes in existence really enjoy shoving humor in there which can usually balance out weird and stupid things in said anime.
As for Anime Items in GTA, I'd be ok with it if it sit in with GTA Lore.
(Don't hate on people who watch anime just because you don't watch it, or the only people you've seen that watch it are that very slim percentile who are huge creeps who do nothing but look at Doujinshi. There are some really good animes geared at older audiences that have really good stories and story telling with a lot of mature concepts.)