I tell them I am short of cash and need $400. Then I ask them for their credit card number. Then I tell them, "so you won't help me?" and hang up. I suggest that we all do the same.
Just called my home phone at 1203PM. Caller I'd said AAGA. A recorded female voice said she was with the American Autism Awareness Group. The recording selects its spiel depending on the response it hears. It asked for decreasing amounts of money each time it heard me say "NO."
Finally, after the lowest amount, it hung up. Strictly a scam.