Hey Shirley - be careful. Many telemarketers live in your own state and most don’t give a (expletive)!
Just to remind you…Shirley has the names and addresses of most of us 
I’d keep in her good books
Well, it’s no doubt probable that they have monitoring software which tracks the outgoing calls made by the TMs, and this guy knew that if he called the woman back and harassed her, he’d be in big trouble. Still, as has been more than adequately demonstrated on this board TMs aren’t always the brightest crayons in the box. (That thread really should be made a sticky, since it’s so damned funny.)
Try this: Your wife and a stranger are heading for the same parking space. She takes it. Goes about her business and drives home.
The next morning she finds a note on her car windshield:
*Dear Ms. Earthworm Jim:
Before you steal another parking space, you should keep in mind that people can find out where you live.
They live in your own state and most don’t give a (expletive)!
So, Ms. Earthworm Jim, the next time you see a parking space; wait your turn.
Your son or daughter or next-door neighbor’s daughter could very well need that parking space. A handicapped, wheelchair-bound person could need that parking space. A biker or ex-con is may need that parking space. You really, really shouldn’t (expletive) with them!" *
No big deal? No concern for your wife? Not the slightest concern that someone followed her home, waited until the house was quiet and left an angry note? Of course nothing may happen, but that doesn’t invalidate the fact, that the note was left to threaten and to frighten your wife. I’m not saying to give into fear, but to at least acknowledge the purpose of the note.
Doesn’t even come close to meeting the criteria under New Jersey law. Maybe harassment.
If a person gently hangs the phone up, the person on the other end hears a click.
If a person slams a phone down, the person on the other end hears a click.
How does one “attempt” a threat?
“If you don’t watch out, I’m gonna beap you senseless … I mean, feat you senseless … feap you senseless … aw, forget it.”
Good one, Steve!
Or his, as the case may be. 
I used to like to pretend to be masturbating while they give their pitch.
Subtly, at first. Just let them talk. Then just a little breath, between the usual polite affirmatives. After a while, they get a bit uncomfortable, and pause to listen. “Keep talking. Yeah.”
Heh heh heh. I loved turning it around and making them want to end the call, and quickly–but not really giving them enough of a legitimate opportunity to. “Really? Uh… is that steam cleaning, or like, uhh… huhn… a solvent-based process?” “Do you do… mmm… furniture, too? Really, I’m very interested. I think I might really be able to, mmm, use your services.”
I see this as more akin to a pitting than the situation you describe. Guy get’s mad, takes the time to write out (and maybe spellcheck) a rant, stuffs it in an envelope & sends it off. It’s slightly more work than hitting “submit”, but not much.
He did NOT, so far as I can tell, go to any extraordinary length to find her personal information like following her home. As he said, he’s got her name & address up on the screen right there in front of him.
You’ll note that I also said taking it to the cops AND trying to have the guys job was good idea. But this:
…is just plain ridiculous. I don’t see cause for this reaction.
I believe that most companies have policies strictly forbidding employees from writing down a name, telephone number, or address from the company’s solicitation list too. It’s the type of “no no” that gets the telemarketer fired in fact AFAIK.
Most of my phones are digital (and wireless). I can’t slam a phone down on anyone anymore. 
Angrily jabbing the “end” button isn’t nearly as satisfying, is it?
I want a phone with a sensor in it that will hang it up if I throw it hard enough against a wall.
KellyM-
Awesome Idea!!!
No.
Don’t piss off the telemarketers.
Piss ON the telemarketers.
Yes you can. You have a table, don’t you? I would think it would be much more satisfying to bang the phone on something a few times without having it hang up, to be sure that they hear how uncontrollably berserk they’ve made you.
I just put the phone down in front of the TV, and leave it there until I get the “your phone has been off the hook too long” sound, and then I hang up.