I'll probably get hated on right now but... I used to work as a telemarketer for Viking Magazine for a month or so a few years ago during the summer when I really needed a job. It was close to my house on Wood St. and I was in dire need of an easy job during some summer classes. After the first day I wanted to kill myself, but I hung in there so I could make money. It was boring, repetitive, and stupid. I will say a couple of things though:
Being mean to the telemarketer, yelling at them, and swearing at them, DOES NOT hurt their feelings. I actually loved it when people got so ****** at me over the phone. I couldn't do anything but hold back my laughter and if I was in the mood I would drag it on more, just to make them more mad.
If you really want to make a telemarketer mad, have them go through their entire sales pitch with you and have them really think you are going to buy something, and then at the last second just hang up. It wastes a lot of the telemarketers time and gets their hopes up for nothing.
And a hint of advice: when I got the people that got really mad and ****** off at the world yelling and swearing at telemarketers, and still didn't request to be put on the "do not call list", their name would go back into the "call back" list. So, if you are going to get mad, at least tell them to put you on the do not call list, otherwise telemarketers will probably put you on the call back list just to **** you off more.