Paul -- We agree on many points (and certainly don't have to on everything).
You say: "people need to think about context and relationship in their communication, and that’s hard, and failure to do so is the cause of many of the problems"
ABSOLUTELY.
We could also (as you and others point out) use some controls on who can see and respond.
I think the only spot we have a friendly disagreement is in assumed right of strangers to respond. I think it is implied.