It's like a computer dialog box. Just as users don't read dialog boxes, phone users don't listen to the message at all. They just wait until the beep and start talking. I used to have a home phone that had voice mail boxes and we had a message that said, "To leave a message for husband, press 1, to leave a message for wife press 2." It had a default mailbox if the user didn't press anything. 95% of calls went to the default mailbox. People are idiots.