I think you've found the real problems, none of which are "short form" messaging: I agree with you that there's an aggression to a public forum where message ca

I think you've found the real problems, none of which are "short form" messaging: I agree with you that there's an aggression to a public forum where message can be commented on by everyone and every past message is "fair game" for "fresh" conversation. Those do seem to lead to plenty of aggression. In the heyday of blogs, long form posts weren't immune to those effects either and that's why blogs invented things like spam checks and comment lockdowns and comment moderation tools.