Sometimes all we need is inspiration.
When I was in Yangtse, I was quite amazed with too many people out there. There were gossips about black magicians and we were also told that some people will give you 'dhu' ~ hemlock in food. Legend says that any food some people touch, and their descendants will turn into poison. Because it is said that they are cursed. The social stigma and dogma attached to this legend will create a very bad impact upon that family, I also believe that that's how one will be out casted.