Dave,
For the sake of the argument, if you let a man born and raised in prison (without any sense of freedom because all he has ever known of is bondage in any sense and form*) make the rules for a group of people, what kind of society do you think he would create?
My proposal for the forum rules would be to be left open to the users discretion, even if that might create minor problems.
If you can restrict the threads deletion privilege (something that can be done only by a request to the moderators, perhaps), just let the regular members to point out any misbehaving users and prohibit the latter ones from having the standard set of privileges.
A self-regulated society of knowledgeable people is always a best-balanced one.
Regarding post deletions, I have found it very handy a few times when I hit the wrong button, and once when I posted a reply to the wrong thread(!).
Now, regarding posts editing, I am sure that you have already guessed what I was going to say!
After all, you said it yourself that,
last time you checked it's running pretty smoothly.
-George
- * Are you familiar with Plato's Allegory of the Cave?
In the end, the captives not only did oppose to and ridiculed their liberated fellow man (that, after he was released, ascended to and saw the real world, and returned back to the cave to release his fellow men from their delusions (their "chains") they were raised with) but they also felt that "[...] it was better not even to think of ascending; and if any one tried to loose another and lead him up to the light, let them only catch the offender, and they would put him to death" according to the translated script.
Plato put it eloquently in one single sentence: 'It is about our human nature, whether it is enlightened or unenlightened.