A Baltimore-area classic-rock radio station, WQSR aka "Jack-FM", boasts that it doesn't take listener requests for songs to put on the air. It does, however, play messages from its call-in line. One of those that tickled me was actually a self-referential paradox:
|Jack, my request is that you don't take requests.|
Now, what can they do? If they don't take requests, they've just taken his; if they do, then they can't.