It wasn't Ranma's obligation to know these things. Point. However...
It IS considered the guest's duty to know what not to do. 

Case in point:
You are (insert gaijin name here) Hibiki, distant (gaijin) relative of
Ryouga. You have walked all the way to Tokyo from the northern tip of
Hokkaido. You pass through the local noh theater, thinking it was a way to
get to Nerima, somehow. Having nothing better to do, you take a seat and
watch. Finally, all that travel has gotten to you. In the middle of a
particularly intense scene you do what comes natural to you, due to your
fatigue.

You yawn. In public.


You may have not known that what you did was particularly rude, but the
Nihonjin around you, who happen to live in the country you walked into, have
taken offense anyway.

Can you blame them? True, you didn't know, but once again, ingorance is a
weak defense.


It is so arrogantly Western for you to think that your way of life is the
'normal' way. So you think it's indecent for women to walk around topless.
There are several nationalities who think otherwise. Nonetheless, to avoid
offending the hosts, the gracious Westerners who put up with the 'stupid
primitive tribespeople', they cover up, and generally try to act acceptably
within the context of their gracious, 'civilized' Western counterparts.

And then you say, 'Why should I learn the customs of just every little
village I come across and rob of their food'? How DARE you.

Pure arrogance.


TimeRunner