Share Expert Knowledge

How does sharing your information make the world a better place ? If I was sharing my information with someone to make my world a better place then I wouldn't do that because it's just not right and for that reason for that is when someone sees my personal information then their gonna talk about to anybody that they know in their world. I know that some people want to share their information to someone that they know from their nighborhood and in other parts of their world and this shouldn't be right for people.