It takes only one person to start a rumor and thousands will jump on that bandwagon with no desire for the truth. Rumors makes juicy headlines. It creates interesting conversations. Few are concerned that it can hurt someone else reputation. People believe that the more people repeating the same story the more likely that story is true and that is not necessarily so. As rumors spread people add and multiply it and some even start new rumors of their own.
A lot of news stories go viral on the internet from time to time some of which are baseless, totally untrue. Before you start a rumor that is likely to hurt some else reputation think twice. There is a saying what goes around comes around and the good or bad that you do will one day come right back at you.