We could also make the default text for the textbox something like:
<p>This is a paragraph</p>
print "This is a block of code";< /code>
<p>Yet another paragraph</p>
That way, even if you had no idea why this way is recommended, you'd know that it was recommended. Signed in users would be able to turn it off in preferences, it turns itself off once you get beyond level 2 or 3, or it only appears for anonymous monks.
... or it'll backfire horribly and every new node will end up with "<p>Yet another paragraph</p>" stuck on at the end.