Showing the finger can get you a punch in the face in many parts of the world. In India, during this general election at least, it can earn discounts at gas stations, restaurants, spas, stores and hospitals after voting.
India’s polling stations mark each voter’s left forefinger with an indelible dot of a silver nitrate solution after casting the ballot to guard against voter fraud.
Could we do this in the US? Not in elections with federal candidates on the ballots and not in some states even in state and local elections.