most of my land line calls are from cold call or robots, I usually just put the phone down as soon as I realise it is a robot, some I tell to post the information, which costs them money and bin it which gives the caller their per call wage, but just costs the firm more money. the ones that really annoy me are the multi calls ones, that just cancel, The computer ones I tend to wind up, as I live alone, sometimes it is nice to just chat, if I have nothing to do. I don't do the on line surveys, as they bring a flood of mail. The same firms use the junk mail drops as well and if there is an s.a.e. I post it, am amazed our address and phone number isn't black listed