They called me tonight to try and sell me a vacation. Pressed one for a live person, then air horned them. If everyone greeted them with an air horn they would give up or go deaf. Keep an air horn by your phone for these thieves. Then use it when they call. It's fun!
Disclaimer - I do not own any air horn company stock nor do I work for any company that makes air horns. I just like using them on phony telemarketers who are trying to steal personal data from unsuspecting people.