I heard a good reply to a stupid question. I was on a flight which had to make an unscheduled fuel stop due to headwinds and weight. The Captain explained it fully and clearly. Passengers behind me started haranguing the FA, rudely and aggressively, and demanded to know why the 'plane didn't have enough fuel and why it used more fuel when it flew into a 180 knot headwind.
The FA politely said that as the Captain does not serve the food and drinks, the CC don't deal with matters related to flying the aircraft.