Unfortunately Joe, while you can provide pretty convincing evidence that Mudcat gets spam, you can not prove that you have not been selective in what you are showing the forum. Also, under the current system, even if for example the previous post was edited manually, you will still not be able to proove that this has occured for every deletion.

Don't get me wrong, I don't need convincing. I'm just commenting that whatever you do, at least under the current system, you could still be just as subject to "us not knowing the true level of censorship in our forum" as you are now. The only way that should remove that sort of doubt is system that automatically took an action,

eg. assuming the "deleted messages" are hidden but remain connected to the thread, it's unlikely to be to difficult to show "message deleted" instead of the posts content for messages marked as deleted.

That type of thing though is something I know you can not do yourself.