Whirlpool is a forum that has tried to develop a more transparent moderation process. Here is a FAQ describing their process:
http://whirlpool.net.au/faq-wp.cfm#3.4.3
Why does it seem like this forum is heavily moderated?
My goal when designing the moderation interface is to ensure operational transparency. The reason this forum seems like a heavily moderated environment is because most moderator actions are publicly exposed. For example:
If a reply is removed...
Whirlpool forums: Reply is replaced with a deletion message. The content remains in the database for scrutiny by other moderators and the original author.
"Other" forums: Reply is deleted without a trace. In most cases, the deletion will go unnoticed by the majority of users, and there is no opportunity for other moderators to disagree or to repeal the action.
If a reply is edited...
Whirlpool forums: Replies can not be edited by moderators. Instead, the moderator can hide the reply and request that the offending passages be edited by the original author.
"Other" forums: Replies can be edited by privileged moderators. At best, this may cause confusion; at worst, it may be deceptive. Depending on how the forum is configured, moderators can edit posts without any indication that a modification occured.
If a thread is removed...
Whirlpool forums: Thread is replaced with a deletion message. The content remains in the database.
"Other" forums: Thread can either be moved into a private area, or deleted without trace. In most cases, the deletion will go unnoticed by the majority of users, and sometimes even by other moderators.
The Advantages:
Users are aware when posts and threads are deleted.
Other moderators can inspect what was deleted.
Moderators use more caution knowing their actions are visible.
Moderators can undo any changes.
Users can feel safe knowing their words can't be tampered with.
Complaints sent to me can be investigated easily.
In summary, while it does seem like a lot of moderation occurs here, it's actually less than what happens on other forums.
Here, moderation occurs out in the open, where actions can be scrutinised. Elsewhere, moderation is done covertly, with the majority of users oblivious to deletions and modifications.