Sometimes ignorance is not a bad thing. I had a conversation with an older lady and at some point she complained that some Indian workers from Microsoft were calling ~3 times a day trying to sell her some product. The person I'm referring to isn't that "tech savy" and might've actually fallen for such a scam. Each time however, she hung up before it ever even gotten to that stage from just not wanting to buy a random product.
Angry responses to the caller funnily enough resulted in even more calls.