An apparently not-so-obvious disclaimer

Considering that some radio stations are having countdowns of 2015's most popular songs, I wonder if any of them will issue the disclaimer I heard one announcer make years ago.  After back announcing the titles, artists, and rankings of several songs in a countdown, he said, "Just a reminder that we can't play requests during the countdown.  During a countdown, we play the songs in the order they're ranked.  I've explained this to some listeners on the phone, and a few of you have said, 'Well, just play mine, then.'  Again, during a countdown, we play the tunes in the order they're ranked."