Within a fraction of a second they could notice that the audio feed exactly matches a fragment in memory, and mute audio till the feed diverges again from history. One would want this mode off for a "Top Forty" radio station, but on for live content.
An easy enhancement would be to press a "kill" button to immediately mute repeating content, and always automatically mute this content in the future. This feature would be useful for songs one never wants to hear again.
Many baseball fans would pay thousands of dollars to never hear the "Kars for Kids" ad again, wondering why they don't explain their charity's narrow mission, wondering if their cars are sold by an intermediary that redirects profits.