I have no problem with Evangelion fanboys or Sailor Moon freaks...but when you've started cosplaying and/or have your house filled with Japanese shit...then there's a problem.
Actually...the cosplaying can be all right. It honestly depends, like if you're going to be at a convention. Then it's all right, because Trekkies do the same thing. Because there are some cosplay costumes that I've seen that are excellent. And then there's the really, really, REALLY crappy ones. And those people need to be slapped around for a goood five minutes.