[rapnie]

Nah, you generalize things too much. A chatroom is whatever you make of it. Generally speaking all the social communication patterns we have in the offline world, have equivalents in online communication. A chatroom is but a channel to convey these patterns. A chatroom doesn't have behavioral norms attached to it. The assumption that this is the case, may be a large contributor to many social media problem areas.

Another example. A project chatroom, and the agreement is that comms are async. But there are moments where multiple members are real-time in the chat. It may well happen that you say "Since we chatting now @JohnDoe, we have a decision to make on this and that". John Doe answers "For sure, let's do that", so you give a follow-up with elaboration. Only to suddenly find John unresponsive for 5 days.

That is a ridiculous situation if you depicted that to happen to you offline in a face to face setting.