If u live in Riyadh and ur friends/superiors think u r a good, reliable person 'cos, among other things, u don't look at ur interlocutors immediately in the eye (as an act of respect), pple living in New York may probably think u r unfriendly and insecure when u avoid eye contact.
What was accepted as good behavior in the past in some countries, like wearing the scarf or "Hijab" for a woman is now synonymous of "extremist" and dangerous behavior. Knowing that somebody is a communist wouldn't be much of a worry now but it could easily lead to great apprehension during the McCarthy era in the States.
So as I said in the beginning, who/what is good and who/what is bad is relative. It depends on various factors like society, politics, economy, history, religion or absence of religion, etc..