I've got a different technique for "survey takers," who are in fact usually push-pollers for some politician, or trying to sell something. My conversations usually go something like this:
Caller: This is (name) from (organization). We're taking a survey today about (whatever). Can you answer a few questions for us?
Me: Sure, let me get a paper and pencil.
Caller: You won't need a paper and pencil, it's just a few questions.
Me: Yes, I need to get your billing information. Ok, I've got it. Where do I send the bill?
Caller: What do you mean? It's only a couple of questions.
Me: Well, it'll be cheap for you then, I only charge 100 dollars per question.
Caller: We don't pay you for taking our survey.
Me: Why not, you interrupted my dinner, and I'm a professional survey-taker, my answers are valuable. You don't think I'm going to do this for free, do you?
Usually they're gone by this time, but if they aren't, I start negotiating with them on price.
With practice, you can do this without busting out laughing as you do it. :mrgreen: :mrgreen: :mrgreen: