At one time most unsolicited calls were genuine, though unwanted, sales calls. A lot were from conservatory and windows makers, or other building-related trades; and common tricks to get rid of them included "I'll have to ask the landlord" , or "I live in a third-floor flat" .
.
One such I received, on my land-line, tried to sell me a portable 'phone contract costing regularly, nearly twice the mean of my normal and infrequent PAYG fees.
After some to-ing and fro-ing, with me trying to point out that financial illogicality, the gentleman with the Far Eastern excused himself, and few moments later a woman resumed the call.
"Oh aye," I thought, "a YL, the charm trick."
I managed to slide off the subject enough to spark a very pleasant conversation for a good twenty minutes about anything except telephones.
Well, well… Angel (she said was her name) called back again a week or so later; again for an ordinary conversation such as about her college course the call-centre wages were to fund, and so on. I warned her to be careful as she was not doing what she was paid to do.
There was a third very enjoyable call, again for about half an hour; and then I heard no more.
I will never know if she had heeded my advice about such highly unofficial calls, or if indeed her employers had found out and moved her elsewhere… or out.