Some people just like to cause others trouble. They don't have any particular reason for it. They just think it makes them look big and smart and "in the know" when actually they don't know much; but they try to spread rumors or make someone look small or stupid in order to make themselves look "big" and try to make others look down on their target as well. People like that never really make any friends and if by chance they happen to move away nobody ever misses them.