Scammers, slammers and spammers: How do you play with a telemarkerter's head?

I got a call from someone today who wanted to convince me he was authorized by Verizon to “save me money”. He was what’s called a slammer. They get you to agree to something verbally and then tack it on your phone bill.

How do you come back to the callers who spam, scam and slam us all too often? Looking for ideas that they haven’t hit, and that will truly wind them in. The more fun we can have with them, the less the interruptions will get on our nerves. With a good enough plan in place, I might actually look forward to the next telemarketing call.