Impersonation, duping, entrapment, mighty falsehoods: all legitimate for journalists in getting the story?

In a recent controversial episode in Italian journalism, one of the hosts of the Zanzara current affairs radio talk show - impersonating a well-known Italian politician - phoned another Italian politician and induced him into talking candidly about the formation of the new Renzi government, revealing in so doing several previously unknown and highly significant details. The recording of the telephone conversation was then broadcast on the radio show, which set off a nationwide tempest of both indignation and approval. Is this OK as journalism or is this not OK as journalism? The session will see two opposing teams (including the protagonists themselves Giuseppe Cruciani and David Parenzo) slug it out. Bring your hard hats. The audience will have the final say on who won the debate.