All the beta testers have mod like abilities. I seen it when RTB was released. I downloaded it but then when looking back saw that the topic had been deleted. Then refreshed the page again and it was back. Ephi could delete topics. I also have the suspicion that he deleted one of my post.
The only ability we have is to delete our own posts. I guess if you delete the first post that made the topic, that would get rid of the topic too, but I haven't tried it.
You're mistaken about him deleting your post.