As we all know, these are 3 examples of people who prefer to play with their own people, whatever the reasons might be.
From what I have experienced, one of the first things these people usually ask is "where are you from?".
Now, is it possible that what they are actually asking is: "are you one of my people, or can I just go out and hunt you down?"
In short: If you claim to be russian/pol/br when a rus/pol/br griefer is about to strike you down, will your life be spared? (or will he at least hesitate long enough for you to escape?)