Did Duterte enhence his image by publicly flipping the bird? Thereby joining international heads of state?

Who have been photographed giving the one finger salute; Former canadian Prime Minister Trudeau; former U.S. Senator Nelson Rockefeller; Ex Pres Nixon; Ex Pres Bush; Ex V.P. Cheney; Ex British Prime Minister Churchill; New Brunswick Legislator Abel LeBlanc; Does anyone know of others?