Um… not to be rude, but since I am Taiwanese, I’m gonna take this kinda personally… Basically, if you don’t like it here, leave. This is “their” country, not YOURS. They have their own habits and customs that obviously does not conform to yours. Since this is their home turf, they can pretty much do what they like… You do not have to be here…
To be honest, they really don’t know what they are doing is wrong. Next time, try, politely, to ask someone you know about their reasons for doing something that bothers you, because they don’t know it bothers you. Perhaps if you see their reasoning, you’ll come to understand that what they are doing is just plain and simply trying to be friendly to you, as opposed to any negative things you are projecting onto them unfairly.
I’m pretty sure that whatever country you are from, it didn’t have many Asians. If it did, then you’d understand. Asians as a culture are polite, nice people, because of how deeply embedded Confusism is within the culture.