Don't touch a Thai on his head. Don't use your feet to point. Don't disrespect the king. Don't get into a taxi until they agree to meter. Pre-quoted prices are always more expensive.
I agree. We explained that my wife was unemployed and completely dependent on me for her survival, with me in the middle of an international contract and her having no friends, family, or connections in the USA.
As long as they believe her (it was true), then they understand she'd have to be insane to try to disappear into the wilds of the USA.