Teen tourists from Australia decided to do some surfing in Venice’s famous Grand Canal not long ago; Mayor Luigi Brugnaro call them 'imbecilli,' fining them to the tune of $1,500 each for their miscreant behavior. Brugnaro also described them as “two overbearing idiots who make a mockery of the City.” Tourists and locals used their phones to videotapethe boys on their motorized surf boards. To…