Agreed, depending on what VNese city you're in, FB use in VN and the US differ dramatically. When I was in HCMC, generally speaking people use FB in the same manner that we're familiar with. When I visited a much smaller province about 2hrs away, those who I met during the week there were VERY eager to friend foreigners (since foreigners in their city were so few and far between compared to the big cities), and likewise they were very active on FB, liking everything and everyone.