I like to turn the tables and try to sell THEM something. Whatever is around that I can see. They don't really like that. The other thing I do is if it's a foreigner (usually is) that can't even say my name right (it's one of the simplest names to say), I'll just make jibberish responses to their questions. They will play right along with you, like you're answering the questions. You eventually have to tell them to go to hell and hang up on them, but it's fun anyway.