This was probably a robocall, because when I ran and picked up, there was nobody there.
Here is something I have heard messes up their autodialers: when you pick up and say hello and nobody answers, press the pound and star key back and forth, one after the other. I don't know if it actually works, but it makes me feel better to do it!
I have also written to my state AG's office about a couple of them, but can't spare the time to do this every time one of these bozos annoys me. I appreciate the efforts of those of you here who are reporting these calls. These people are hurting productivity of other people, even if they don't succeed in robbing anyone. They need to be prosecuted!