Perhaps another idea is for some sort of list of deleted posts at the bottom of self moderated threads so that if people want to read what has been deleted, they have the option.
My only qualm with this suggestion is that it still limits the visibility of any evidence or accusations that this suggestion was originally meant to protect the visibility of. I
really like the idea, for general-purposes, but in the context of "the lazy newbie that falls for these things" it would be rare that they read through the "deleted posts" section of a thread.