The email prankster tweets under the name @SINON_REBORN, where he posts his pranks, and describes himself as a “lazy anarchist.” In June, he hoodwinked Lloyd Blankfein, CEO of Goldman Sachs and Michael Corbat of Citigroup, and he did the same to Barclays CEO Jes Staley in May. Staley, thinking he was being emailed by Barclays chairman John McFarlane, praised the man he thought was his colleague in effusive detail, saying among other things that he had “all the fearlessness of Clapton.” The prankster said Staley was the most surprising of the responses, because it was the first one and because “he responded in such gushing detail.”