I do not agree that my suggestions are currently in use by the moderating team. Even if it is, it should be made official for all to know that they are in fact in use and should be followed by all members. To go into detail:
"1. If it is a minor infraction a warning could be issued to the poster to let them change the post themselves. The line between a minor and major infraction must be found by the moderating team and be enforced equally between all posts."
I do not know of, or should I have to know if this has taken place. It is behind the scenes work and should be kept out of the public eye. I cover the point where there has to be a level accepted between all administrators and moderators.
"2. If there is a major issue with a particular post, an administrator or moderator should edit or remove the post. Posts should be edited so that useful content is left intact, and only materials in question are changed."
Never happened. Went straight to lock. My major concern. I personally did not see any warnings, but they may have just been too passive. Refer to point 4.
"3. If a post is edited or removed, the editor must post their reasons for why the post was modified. This lets everybody know why such an action was taken, and helps prevent future problems."
Never happened. Nobody knows why the thread was locked and why an administrator or moderator took that action.
"4. All administration or moderation related actions should be clearly stated, preferably in the post in question. I recommenced using bold letters, even better if it is in another color rather than black."
To grow on this, if a post needs to be completely removed, the body of the post should be removed and replaced with the reasoning behind the removal. Just makes it easier for everybody to know what happened.
"5. Locking a thread should be a last resort, and should be discussed between administrators and moderators before any action is taken. Of course points 3 and 4 apply here."
It seems locking a thread is considered a first response instead of a last resort. As M Speed said, locking a thread doesn't do any good. Whoever makes the last post is basically "the winner" since nobody can reply.
That's pretty much the defined version of what we have in "the jungle".