I hate telemarketeers, and when I tell them I am not interested in their product and they try to keep on. I just simply ask them "What part of N O is it that you do not understand" and then I hang up.
I once heard that a lot of these people are in prison and rec. pay for making these calls. Have no idea if this is so or not, but it is scary to think it might be and that they may have my phone number. I have caller I.D., but it often shows up as unavailable. The only reason I answer it then is because when our son calls in on our 800 number it shows up as unavailable. If I can detect the number I just don't answer.