Banks still just don't get it

Credit card people rang today and immediately asked me to answer some security questions. "OK," I said, "prove you are the credit card company."

"I can give you a telephone number to ring back" she said. Duh!!! that's just a random number and not even the number on the back of the card.

I rang the number on the back of the card and eventually got back to the first woman so it was all OK. But really, did they expect me to just trust someone on an unsolicited telephone call?