I will answer the call whenever I can. Its not usually a live person but if it is, I politely ask to be removed. If its a recording, often there will be an option to "press XX to be removed" at the end of the long recording. Most people don't answer or don't listen all the way through, but I'll try this if I'm able to. I also block the numbers on my iPhone, ensured I am on the "Do Not Call" list, and have also used NoMoRobo for my landline. All of these things together result in maybe 2-3 calls a week for me, on average. I see NoMoRobo has an app for iPhones now so I might add that too.