The most salient anecdote Taleb tells about himself is the one where he's going onstage to debate an opponent. He asks his publisher if punching the other guy in the face would be against his contract, and his publisher notes that it would be very good for book sales.

All Taleb does is punch people in the face nowadays. It's probably very good for book sales. He notes elsewhere, rightly I think, that the goal of anybody seeking PR should be to get the attention of somebody more famous then them: since it's much easier to pick fights than make friendships, and either will do, he picks fights with anybody he thinks has prominence. I believe it's a persona, and he's a very good method actor.