What happened to when you didn't like someone you just weren't their friend.

Nowadays when someone doesn't like you they seem to make trouble for you. In the old days you just didn't let them have the opportunity to be your friend, their loss. In today's society you don't even have to say or do anything to be personally or physically hurt by someone. They were either never taught or have forgotten that if you don't have anything nice to say then don't say anything at all. They let mean nasty hurtful things fly out of their mouth as fast as they pop up in their mind. They walk around spewing hate that they feel deep inside their soul. Where did all their pent up anger come from? How can they let go of their anger? Anna and Elsa's song Let It Go needs to be their motto.