But the mod will use one of the available TOS categories. If you have all those categories unchecked--as we all do right now, or at least did yesterday--I don't see why would wouldn't be able to read the original post.
And what if the post contained, say, vulgarity, but in addition to that contained potentially useful information? Same for a personal attack. The way it was, the user might realize his post would be okay if he simply removed the vulgarity or attack. Or a mod or admin could suggest how he could fix it.
But wait... Now the offending posts will disappear even for the person who wrote them, I assume. So it won't be possible simply to remove the objectionable parts and repost.