Each telemarketer has a list to use, so it possible to get 200 calls from people selling the exact same product, credit cards are the worst in my area, to which I finally solved my way, I was tired of all the calls trying to sell me the same card, telling every one of them the same thing, take me off their list, which they did, only to have the next one call back.
Well I'd had enough, so when one called I told them to not waste my time unless they had a card with a 100k limit and they'd hang up, finally someone came up with a preapproved 100k limit card, to which I told him great, now find 4 more with the same limit and I'd sign up today, to which the moron on the other end, stammered some and said, that 500k worth of credit, what would I ever need that much for, to which I told him, I planned on buying a house for 500k and put it on my crdit cards, then file bankruptcy and screw them blind and keep the house, its perfectly legal in my state to retain ownership of one home. Well the converstation got heated to which the guy on the other end was screaming at me calling me a theif and crook and the list was endless, to which I told him, not to worry, the next dozen idiots who'd call I'd get the cards from them instead and put my plan in action. Then the idiot on the other end went into orbit and told me he had the power to make sure I'd never be offered another credit card as long as I lived, I laughed at him telling him how the system works and he was wasn't smart enought to ever accomplish it, to which he blew up, and told me he'd have me removed from every peson selling anything over the phone forever. I laughed and told him to keep on dreaming and when he woke up, I'd have a million dollars worth of credit and my wife and kids could each have their own house compliments of the credit card agencies worldwide and hung up. It took about an hour and he called back, claiming he took care of me forever, seems he was right, I've never had another person calling to sell me anything over the phone, or in the mail since, and that was almost 10 years ago, too bad his number was restricted otherwise I'd call him to tell them thanks, turns out he had the power he claimed he did, imagine that, they can do something usefull if motivated enough. And it works better than the don't call number ever did, some days you just have to outthink them a little bit. Got the political adds to quit calling too, but that's a whole post on its own, works like a charm too when they think you have alzheimers diesease.
