While people might not delete their accounts en-masse, this does hurt them. When you upset your users, you drive them away. They use your product less, and as

While people might not delete their accounts en-masse, this does hurt them. When you upset your users, you drive them away. They use your product less, and associate with you negatively. The more this happens, the more people stop posting and sharing, and everyone simply stops using the site. Remember most people on MySpace didn't delete their accounts, they just stopped using the service.