You lost me at "hello"

A call I got this afternoon (call display tagged it as "LONG DISTANCE"):

Me: "Hello?"

Recorded voice: "I'm sorry, that was an invalid response. Press 1 to learn how to lower your interest rates..."

Me: [click]

They'd probably have more success if "Hello" was a valid response. Or if they ducked their heads in a vat of steaming sulphuric acid. Either one works for me.