I feel sorry that they have to put up with abusive behavior. Just hang up and move on. But can you really just ignore abuse? It must be leaving a mark somewhere

I feel sorry that they have to put up with abusive behavior. Just hang up and move on. But can you really just ignore abuse? It must be leaving a mark somewhere. I have also had abusive users and customers and I also ignore them. But can't get it out of my head sometimes. It keeps bothering me.