First - Yes, I am on the Do Not Call registry. In fact, I can tell you I registered at 8:18 am the first morning they opened up that Web site. About a month after it kicked in, I was able to cancel my Caller Id add-on service since my cold calls dropped from 15 per day to zero. But if they are non-profits, or if they are just doing surveys, they can still bug the crap out of you.
When I get one of these calls, the most I can usually muster is to politely tell the person calling me that whatever they are selling, or giving away, or asking me about in a survey, I am not interested. Then I politely ask them to remove me from their call list, I thank them, and hang up. I do not want that job!
The last person who came to my front door was giving away free home alarm systems. Really? Free? Yep, free. Then I said that if it were free, then there would be no monthly fee to use it, right? Er, no, it was just free installation. Aaaah, so it is NOT a free security system, just free installation. Then I am not interested. He proceeded to tell me about the recent increase in crime in my neighborhood, and I pointed out the No Solicitation sign at the entrance to the neighborhood, then I thanked him and closed the door. I figure he wrote down my address and he'll send someone back to rob me later. So far, so good, though.
But here is someone who got really clever and did something about those cold calls.
Okay, it was a mean thing to do to that poor guy, but on some level, you've gotta love it!