Everything you type in a group chat is a record with fifteen copies.

Group threads feel like conversation and behave like documents. Every message exists on every phone in the room, outside your control, available to be captured, forwarded or read by someone who joins later with no context. The casual tone of the medium is what makes this easy to forget.

Write in group chats as though one message might be read alone by a stranger. If something needs the full context to be fair, say it in person instead.