re-factoring? Separation of Content and Presentation. Allow "outlining" with sectioning content without throwing errors?

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I wonder if during refactoring, one could allow, by default or by simple 
switch, ALL the sectioning commands to be accepted without throwing errors.  In 
trying to make semester-long lecturer's notes, I found that I occasionally 
wanted to create outline structures in latex sectioning in preparation of 
*content* (Essentially, I reuse, the same outline and some of same content with 
different levels of detail: a course overview, beamer/beamerarticle for 
slides/lecturenotes, problem sets, etc..   I was trying to use Tufte for some 
of this and the inability to handle only a few levels without throwing errors 
prevented use.)  

I would *agree* that for the default *presentation* for Tufte-latex the lower 
sectioning commands would have no or very subtle effects on *presentation*. 
Subsubsection might, by default, look like newthought.  Paragraph and 
subparagraph would essentially the first sentence of a paragraph (perhaps, with 
emphasis).  Or what I would prefer is that all would be first sentences with a 
rather modest large/medium/small semantic break in spacing with previous 
paragraph for subsubsection, paragraph, subparagraph, respectively.  Perhaps 
one could specify the semantic breaks to be either all standard spacing or a 
3x, 2x, 1.5x spacing.    

Original issue reported on code.google.com by jworker...@gmail.com on 27 Feb 2012 at 5:16