According to Grace Note♦ here, the "front page" of a site filters out some questions:
The "home page" of a Stack Exchange site will filter out all questions that fall below a certain threshold. This is -4 score for main Q&A sites, and -8 for Meta sites. This is because the home page is meant to highlight quality content, so that a brand new visitor will see good stuff.
This happens on all tabs on the front page, including active. However, I don't think it should be this way for a few reasons.
- For science, I edited the MSE question that isn't showing up in one of the screenshots below (sorry, I know it's super off-topic), and it still doesn't show up in the active list. This means that some vandalism is likely to fly under the radar.
- Heavily downvoted questions that are edited don't get any attention, even if the question is perfect now.
- New answers don't get any attention. If people don't vote, good content can't "float to the top" like it should.
I understand the desire to not show "garbage" to new users visiting the front page. But I don't think it makes sense to not show these posts to users with some rep (or even an account) on the site.
A question was asked on MSE 4 hours ago:
But does not show up in the active list:
A question (on a non-meta site) was asked "2 hours ago" and it shows up in the newest questions list:
But it is not shown on the list of active questions: