When somebody doesn't like you they can give your name to professional harassment firms that constantly bother you for no reason. The phone calls are just a small part, and the operator will never offer a real service or anything a legitimate company would pay them by the hour to do. It's all about wasting a small portion of your time and stressing you out for the other elements of the game. I did this myself for awhile
The first words out of the callers mouth were "I am f*****ing your mother". My husband replied, "Hope you had a good time, she has been dead for 40 yrs. and her name was Patel so it was probably incest." He always messes with their minds and it pisses them off so badly, they call to curse us out whenever they get a new number that we don't have blocked yet. They are so frustrated that they call just to harass Americans. Poor [***]