Actually Hannibal in 211 bluffed a siege of Rome, camping in the place called Campi di Annibale (Hannibal's Fields in Italian). According to Eutropius Breviarium ab Urbe condita, the Senate decided to take a good laugh by auctioning the land where Hannibal camped his army.Bilbo wrote:After the Romans got over the momentary shock of Hannibal sieging the city (which would have lasted about 15 minutes) they would have fallen over themselves with glee over being sieged.
I can't guarantee the factuality of the auctioning, as Eutropius wrote over six hundred years after the war, but the fact is that Hannibal tried to lift the Roman siege on Capua by bluffing a siege on Rome, and not only the Romans in Rome didn't gave him a shit, but the army at Capua didn't fell for it and took the city.