An actual exchange I had with some guy on the street just a few minutes ago:
He:Trenchcoat mafia! (I'm known locally for wearing my trenchcoat at pretty much all times.) You're not gonna shoot us, are you?
Me: (Already in a rather cynical mood, and having heard this kind of crack a zillion times before) That's so clever and original.
He: (pauses) No I'm not.
Me: OK, you're right, you're not.
Who am I to argue with that?