I often get calls at home, from people trying to sell me either new windows for my house or some low-cost mobile phone service.
I used to hang up on those calls, but not anymore!
Now I put them on speakerphone... and give the receiver to my four-year-old. He's very excited that someone wants to speak to him, and starts talking about his day right away.
This has transformed a very annoying experience into a great form of entertainment for the whole family.
And it shifts the burden of rudeness to the caller... how dare they hang up on my son!!!?!