I think that the information about Feng Shui is evident and every people in their house should not forget it. So I think that it just is common sense.
I don't know anything else about Feng Shui, is the first time that I read about it.
No, I don't know anyone who believe in it, but yes I know someone that don't have common sense to get organized his house. Yes I know, I think that the most of the buildings are designed with commom sense so Feng Shui is present.