That reminds me of one of the scenarios that someone ran at our D&D club. The set-up was "you've slain the dragon, now you have to get its head back to town to prove that it's dead, in order to prevent the corrupt dragon-cult from taking over." We'd been sold on the time pressure of the mission from the start.
So when the DM had us passing near another town and described it being under attack by a different red dragon, he sat back and waited for the party as a whole - and my oath-of-vengeance paladin in particular - to charge in like big darn heroes and rescue the town. And was very taken aback when I said that, for the greater good, we needed to keep heading back to the city and not get distracted.
And he basically spent ten minutes trying various arguments to convince us that we absolutely had to go to the town, my favourite of which was "It's getting late, and this is the only safe place to sleep for miles."
"Yeah, but it's being attacked by a dragon. That's definitively the least safe place to go to sleep."
I forget how it ended, but we did, in the end, go to the town and find out that the dragon was an illusion cast by the evil dragon-cultists to maintain the pretence that the dragon was still alive.