I've started to think more about that as I've gotten that reaction so many times. I think it's a lie told by people in the alleged comedy industry in a similar way that not dissimilar lies are told by the porn industry as to its value and [cough!] virtues.
I can't think of a word for a conventionalized lie told for commercial reasons, at least not of this type. It's such a pervasive dodge of jerks who make money out of bringing down the collective human culture and society there should be a word for it and a sharper definition of it.
Update: Duncan Black, with his claim made yesterday that the Holocaust could be joked about because "any subject can be funny", convinced me the reason his blog is crap is because he's a jerk. With that he freed me from having to care at all what the jerks who hang out at his place think, at all. Even the three or so I had any respect for lose some of it by frequenting it.
Did you hear the joke about the twins Mengele experimented on, murdered and dissected? Apparently those guys think there must be one possible.
Update 2: " you are a humourless...."
April 4th, 1984. Last night to the flicks. All war films. One very good one of a ship full of refugees being bombed somewhere in the Mediterranean. Audience much amused by shots of a great huge fat man trying to swim away with a helicopter after him, first you saw him wallowing along in the water like a porpoise, then you saw him through the helicopters gunsights, then he was full of holes and the sea round him turned pink and he sank as suddenly as though the holes had let in the water, audience shouting with laughter when he sank. then you saw a lifeboat full of children with a helicopter hovering over it. there was a middle-aged woman might have been a jewess sitting up in the bow with a little boy about three years old in her arms. little boy screaming with fright and hiding his head between her breasts as if he was trying to burrow right into her and the woman putting her arms round him and comforting him although she was blue with fright herself, all the time covering him up as much as possible as if she thought her arms could keep the bullets off him. then the helicopter planted a 20 kilo bomb in among them terrific flash and the boat went all to matchwood. then there was a wonderful shot of a child's arm going up up up right up into the air a helicopter with a camera in its nose must have followed it up and there was a lot of applause from the party seats but a woman down in the prole part of the house suddenly started kicking up a fuss and shouting they didnt oughter of showed it not in front of kids they didnt it aint right not in front of kids it aint until the police turned her turned her out i dont suppose anything happened to her nobody cares what the proles say typical prole reaction they never --