maybe people can follow the stream, if they want to join th…

maybe people can follow the stream, if they want to join they need a nod or a way to be accepted. I'm thinking of real world behaviour and how people join conversations. There's usually an acknowledgement of acceptance, a smile, "hi", a gesture or a way to be known as a part of the flow before stepping in. Generally by one key person or an agreement between the host and another. Otherwise GateCrashers... ThreadBreakers.. QuestQuakers. Online behaviour can be borderline psychotic sometimes.