so all you suggests are these people are too naive or single

so all you suggests are these people are too naive or single minded. So after a couple years in the US when they faced the harsh realities they are doom to fail or regret, right? How are you so certain that is going to happen? How are you so certain that they do not know anything of US? LOL 

So I suggest you are a little out of the way to wish them fail to prove whatever your point is...