Try to sell cold callers something and be very insistent. Works well. Also good for door-to-door sales people, especially if they're wearing poor shoes.
Sean O'GradySometimes I pick up the phone, listen to cold caller alias name, repeat it several times in an incredulous tone and then - bam! - pretend to recognise them. I ask them if they remember the hell of a time we had at the 1985 summer camp when we set fire to the wooden shed, and I keep making things up and go on and on until they end up terminating the call.
Sean O'GradyThey are a special breed-like normal accountants, but without the soppy sentimentality. These are the oncologists of market capitalism.
Sean O'GradyI tell cold callers I'm very interested but a bit deaf, my hearing aid is not working properly and can they speak up. The idea is to deliberately miss-hear what they say, ask them to repeat, only louder, and see how loud I can get them to shout. After a while I say "I'm not really deaf" and was just wasting their time, as they were doing with me.
Sean O'Grady