Re: You boys and girls actually answer your phone?
"Withheld" was very recently my sister calling from a hospital staff phone because she couldn't get her mobile working and needed to be picked up. "International" could be my friend who lives in Damascus and whom, for obvious reasons, I tend to worry about. Etc. It doesn't take long to dispose of a cold call, it's usually obvious within 10 s. I prefer to answer than to risk getting it wrong.
I did get a huge spate of nuisance calls after my car had been in a body repair shop (damage done when no-one was in the car.) Insurance company told me the database only has registration number so would need an "official" body to get from there to my phone number. The most likely source of the leak was obvious but how can you prove anything? "I'm calling about your compensation..." "click...". Secret is not to get annoyed. There are worse things in life.