Don't let it be the largest word in your vocabulary. This rule speaks for itself. Someone else may say something that instantly brings an idea to your child's mind. Even though they're eager to say what they're thinking, you can remind them to wait their turn to share their ideas. The road to good conversation is a two-way street.
Nobody wants to travel a road filled with potholes and detours.
Sometimes people spread dirt about others because they think it will make them look superior. This is never the case. If your son or daughter doesn't show respect for others, then eventually others will lose respect for them. If the kids encounter someone telling them the latest rumors, then they can be sure those same people are also telling rumors about them.