pretty sure i'ev heard it before. and why the shock now, a month later, did no one notice it? has a long history of such gags if not this exact one.
in one act he states the audience judge whether a joke is acceptable, if they laugh it is, if they dont it isnt. goes onto one about Princess...
his jokes are deliberatly provactive and controversial. you can read them on different levels, laugh because you find them funny, laugh ironically that they are in bad taste, or get upset about them.