We have had a plethora of cold calls recently, and I still haven't worked out the best way to deal with them. On a good (kind) day I will just say no thanks, but on a bad day, when I've already had several, I'm not quite so nice. I know the person making the call is just doing a job; I know s/he may have no other way to make a living. All this I know. But I hate this regular intrusion at (usually) a busy time of day, at a time of the caller's choosing.
I've just had one of these calls, and when the caller asked for Mrs. Stott (that's my other name, by the way), I said that no, she couldn't come to the phone, as she was very ill in hospital (I stopped short of saying that I had died, as I'm very superstitious, and I've got a book to write).
Which reminds me of the worst cold call I ever had, which was from a charity. It went something like this:
Caller: May I speak to Dr. Garrood, please?
Me: I'm afraid you can't. He died last week.
Caller: Oh. I'm sorry about that. Is that Mrs. Garrood?
Caller: Well, I wonder whether you would be able to do some house to house collecting instead?
Me: ****! *******! ******!!!!