First of all let's define "Common Courtesy" ; I define it as treating others as you would like to be treated. (I think my Mother and Father probably drilled this in some where along the way.) For example, when I leave a voice mail message asking for a reply, I think that person should have the "Common Courtesy" to reply. And, I am not talking about someone I have never met; I am talking about someone who has contacted me, we have met and they have requested services. I know the replies aren't always going  to be rosy or detailed, but a straight-forward, honest reply would be appreciated. It takes mere seconds. I am not sure when this "practice" evolved or changed, but It kind of reminds me of the "signs" in fast-food drive thru's and at cash registers that say: "Please do not use your cell phone while in line or placing an order". I can't believe people can't hang up for five minutes and give another human being five minutes of their undivided attention. I never thought I would feel "old-school"; but I do. I never thought I'd wish for the way things used to be.