"Would you like to play again? You have selected: no."

Or when Laura Linney's love interest tried to kill all of the Greeks in 300.

Pandora "plays" are basically for one listener though, right? Wouldn't a radio station's 19,000 plays hit, conceivably, quite a bit more than that?

There is a strong cultural rule in Westeros involving guest hospitality ("guest right"). If you eat food at someone's home, you are under their protection until you leave. It was only mildly touched upon here (the food scene when they first arrived) but it's a Very Big Deal in this world that the Freys so violently…