Used to be nice to telemarketers because they have a crummy job. Then one somehow talked me into buying magazines. They said I was chosen for some great deal for some small amount of money. I inexpicably give them my credit card info. Then, afterwards, they pile on charges and "services" that they say I "agreed" to and won't let me out of it. When I finally realize what happened, they already took a few hundred dollars from me, and when I call them to ask them to stop the subsciptions, the lady goes on the offensive and refuses to budge, saying I agreed to a 14 month subscription of their amazing service.
Fortunately, my bank gets my back, and cuts them off. I've gotten all sorts of letters and bills telling me how delinquent I am, and they continually call me to ask me to pay. The letters they send say silly stuff like "we certainly are entitled to our money" and "please pay" and "patience can be a virtue for so long" and "we want to provide the best service but we can't we giving you our amazing service if..." When they call, I either hang out right away or tell them how ashamed they should be for partaking in their shady company's scams of innocent people who simply were too nice to hang out on an annoying telemarketer. They still keep sending me magazines that sit in my doorway until the apartment custodians clean it up.
Moral is: Now, I'm flat out nasty to anyone who tries to telemarket me. I'm naturally a really nice guy, but getting scammed out of the hundreds of dollars was enough to make me clamp down. And that company still wants even more of my money.
I laughed at this one, but part of me also felt some retribution.