E.
My husband had some teenager girls get his cell number and they would call and hang up all the time, and text him stuff like "Justin iz so hawt!" It got annoying. First we got an airhorn and blew it whenever they called. The last time they did it I answered, heard them giggling, so I pressed a random key on the phone and said, "Yes, officer, this is the caller and number I want to prosecute." They never called after that. They were kids so it was not hard to scare them a little.