Perhaps some kind of "HN gloves off" mode might work. Or HN After Dark. Then the traditional civil mode could be retained, while allowing the more wild tangents to run their course in a separate but related area or mode. I think this is inevitable for online discussion. Politicians have their formal, respectful discourse zones, but gloves come off in certain places and contexts where heated exchange is not only acceptable, but expected. And these are the people running things. So to deny the same for the general population, will never sit well.