Thanks all who responded. I said no, but. I think we should be able to participate in "the public square" -- having an open discussion with acquaintances and strangers interested in the same topics -- using the same tools as we do for "personal updates" -- family photos, focus on friends in trouble, work considerations. However, I think those platforms need good affordances so you can easily tell when the loudspeaker is on, and you don't mix levels of privacy accidentally.