What someone else thinks is their business - it's caused not by you but almost everything else that happened in the universe. Sometimes people just didn't eat breakfast, or someone beeped their horn at them on the way to work. Sometimes people are imbalanced and give inappropriate attention to the sign of fault. All of these things are not your responsibility.

What is your responsibility is if you chose to listen or not - you don't have to be involved or give someone else your attention if you don't want.