Perhaps there is a police officer somewhere who would interpret an automobile passenger’s giving him the finger as a signal of distress, creating a suspicion that something occurring in the automobile warranted investigation. And perhaps that interpretation is what prompted Insogna to act, as he claims. But the nearly universal recognition that this gesture is an insult deprives such an interpretation of reasonableness. This ancient gesture of insult is not the basis for a reasonable suspicion of a traffic violation or impending criminal activity.
U.S. Court of Appeals for the 2nd Circuit affirms our right (.pdf) to give police officers the finger.