Like many people in this forum (i guess), i am very interested in japan so i understand why you think that japanese customs should be followed.
But i also understand that many other people, who are not as fascinated as us in japanese culture, could just want to see but not to imitate a different culture. And most of the gaijin in japan are here only to do that : to see different culture but with the confort they have in their own country.
I know, it's sad, but this is our world and i can't think that we can do something about it.
(Excuse my bad english, but i'm french
)