Art is right. If you have a concern about a specific instance of the moderation policy, the most effective way of dealing with it is to contact one of the moderators via PM.
As for "censorship", threads and posts get deleted for a variety of reasons. Some subjects are banned outright for self-explanatory reasons, but there are also housekeeping issues. For example, a topic might get picked up by a trolling group from outside the forum. In that case, a thread or post will be deleted to discourage the trolls. There are other issues as well. That's why a generic post to the forum about disappearing threads rarely results in a satisfactory answer.
