Today is the first time. that I know of, that this number appeared on the caller ID...as I approached to pick up the phone, the answering machine picked up and the caller sat on the line and didn't leave any kind of message.  
I would really appreciate a message!  How can I return a call if no message is left.  If the caller doesn't want to leave a message it must not be important enough for a return phone call from me.  Just because they don't speak with someone in my home, that is not an invitation for the caller to repeatedly call my home!