Comment by hibikir

Back when international phone calls were a real thing, messing with answering machines that had default settings was a typical fraud vector. People would change the message to say 'I accept' a couple dozen times. Then, they'd lace a collect call with a third party payer, pointed at said answering machine... which accepted the charges. Just not best done from one's home phone, as sufficient charges pointing to the same number would risk attention.