Most things about this site change and evolve, based on usage and feedback. As it stands today, these are the criteria:
1. Negative marked posts are hidden.
2. The original blog entry and the "latest day"'s posts are displayed. All posts in between are hidden. For e.g., if the latest post was Yesterday, then all of yesterday's posts will be displayed. If someone now posts a reply Today, then today becomes the latest day. So, all of Yesterday's and prior posts will now be hidden. The one post made Today will be visible....
more... And of course, all subsequent posts made today will also be visible.
Thanks.