Hey, thats very cool! But not what Osso and I were talking about.
What Osso talked about, or at least what I thought she talked about and I responded to, was whether posts or topics become invisible once enough people have voted it down. When I went to check my profile, the default was, like, -10 or more votes made a topic disappear by default and -5 or more votes made a post disappear by default (or the other way round, I forget). And if you want to see all posts regardless of how many people vote them down, you needed to change the setting to "no collapsing".
What Craven's thread in your link is about is the default for how every post appears. Like, do they appear in this standard size with scrollbars if they are longer; or do they automatically expand to size. Default was the standard size with scrollbars. I had already changed my preferences to having them all expanded, and was kinda worried that the default being a short box where you have to scroll for any post longer than a throwaway line would discourage longer or more substantive posts. So I'm happy with this change.