Back in the '90s, we used to pass messages around from payphones for free by stuffing them in the name recording on automated collect call authorization systems

Back in the '90s, we used to pass messages around from payphones for free by stuffing them in the name recording on automated collect call authorization systems. We'd call the 800 number or dial 0 to setup a collect call and when the machine would prompt for a name, we'd stuff the message. The end result was the recipient receiving an automated phone call that would announce: "Hello. This is Pacific Bell. You have a collect call from WEREATTHEBEACH. Press 1 to acc..."