Yeah, it’s not like we have complex social rituals, informal rules and elaborate signs and calls designed to establish the appropriateness of in-person interactions. I just punch anyone in the face that I don’t want to talk to me, that usually gets the message across. And if I want someone’s attention I just scream my demands at the top of my lungs an inch away from their face. If they don’t punch my face I assume they are fine with the conversation.