There have been several people recently who have been caught by the spam filter for spamming even though they weren’t doing so. If this happens to you, then the spam filter might also retroactively remove all of your past comments, and at first glance that can look like that there’s someone actively moderating or censoring the comments. There is not.
The spam filter is programmed to catch bots, and so if you post too fast after loading a page or too frequently within a small time-frame, it’ll think you’re a bot and will flag you. If you see that your comment has been marked for moderation, or if you get a message saying that you’ve been caught by the spam filter, don’t fret and try to repost it right away – that’ll just get all of your messages deleted automatically. The best way to rectify any comment problems is to email me with your username and email, and I’ll correct it immediately. Incidentally, I don’t plan on changing the spam filter anytime soon because it succeeds at catching 99.9% of the real spam, and there’s a ton of that.