Let's say he wants to fix the mistakes he made in the previous days, but what could be the reason for deleting others' posts from a self-moderated topic? Fortunately, I did not post in his self-moderated threads, so none of my posts were deleted. But he managed to delete his posts from Gazeta's thread and managed to make all my replies merge and delete the original posts.

So basically, he is trying to punish everyone by deleting their posts, but I doubt it's any kind of punishment. I don't think any active forum members will be affected. But it's disrespectful.