Mystery solved, sort of: It seems reasonably clear to me that Daniel Kaufman, a.k.a., Dan Kay, a.k.a. Dan Katze, a.k.a. the Busted Chef, a.k.a. the Montauk Grifter, never actually worked as a producer on Hell's Kitchen, as he repeatedly claimed to the people he conned. But he definitely managed to convince several of the show's former contestants that he worked there, which is some fairly acrobatic grifting.