It's bad when people spread rumors. People start rumors because they are jealous about a person or they don't have anything else better to do.
Rumors can hurt a person's feelings Edit
Everybody spreads them though at least once in their life, but that doesn't make it right.
They bring fights Edit
Rumors lead to fights because somebody spreads things around that are not true then someone wants to jump someone else because it's all about the he said she said bullcrap
lower your self esteem Edit
If people spread more rumors it can bring a person self esteem lower or lower What's in Wikipedia for "Rumors"