Lets people play silly f*****s with previous posts as well. I suggest "Once there have been subsequent posts, let there be no more edit function. If you want to fix a mistake, own up to it in a new post. If you're trying to be clever, don't bother, because you will only get caught and look even more like a dick."
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"There is a time when the operation of the machine becomes so odious, makes you so sick at heart,
that you can't take part" [Mario Savo, 1964]