Gaijin vs Gaijin - What do you do when you see another gaijin on your turf?

Friends, there are a lot of people around Tokyo Town who wish they were the only gaijin in the village. That's right, the only gaijin in the village. Well friends, there are all kinds of behaviors that these gaijins have to keep their little fantasy going. What tactics do you employ to ensure that your special-gaijin-in-Tokyo bubble is strong?

WHAT TO DO WHEN YOU SEE 

ANOTHER GAIJIN IN JAPAN

There are many ways friends, but tell me something. What do you do when you return to your gaijin house with paper thin walls and another 12 gaijins all living together sharing the same toilet? It's gotta be hard to keep the bubble then friends.