How To Piss The Hell Out Of Telemarketers
Tip No 1
Ask repeatedly if the conversation is being recorded. Claim that the police been listening ever since you came back from a secret mission to Kalimantan. Convince him until he hears the clicking too. Then you win.

Tip No 2
Act interested in whatever he has to offer. And you have to stutter. Expalin that you have a neurological disease and that you can't bitch!! control what goddamn titties comes out of your assface!! assface!!!

Tip No 3
Interrupt his sales pitch with a piercing scream, like in "Run, Lola Run". EEEEEUUUWWWWWW!! I just spilled coffee on my lap. And act as if you've accidentally made the situation worse. "I got to get some salt on this burn before its...EEEEEUUUWWWWWW!!!". You get bonus points if he offers to call the ambulance.

Tip No 4
Explain that you've just return from a Chemical Brothers gig and your hearing is dead. Ask him to speak louder...louder...LOUDER!! Make him start his pitch all the way from the top. Then wait patiently for him to give up or slam the phone.