Yeah, the whole idea was for noobs, in hopes they may actually read it before posting. I might say put a brief on "how to format your post" with a button that leads one to the posting box, but I'm sure that'd be shot down as just a hindrance. However, perhaps it'd make sense if it was shown only for those who are either anonymonk, or first-time posters (or people with a monk level < N who have had consideration against them for improper formatting in the past).
I've never seen the PM code nor its DB, so I would have no idea if such a thing was even possible (or at least reasonably feasible).