The caller doesn't leave any message. I get the reason they need to call but how many times will they call before they stop doing it. I don't mind it being once a day, but if they called four times I think it is harassment. We should start a petition to stop unwanted calls.
I usually don't the phone if I don't know the number BUT if I have a chance to google the number and find out it is a scam, I will answer it by blowing my ref's whistle and then hang up.