Brion Vibber noted at the WMS Workshop that Wikipedia starts it's headings with two equals signs because the page title itself is considered as the top level heading. I find this a useful assumption. Our LaTex converter for JSPWiki makes the same assumption, combining different Wikipages as chapters using the page titles.
It would aslo cleanly stand out of the text. Just to compare the two aproaches...
= Heading - listelem 1 - listelem 2 - listelem 3
== Heading - listelem 1 - listelem 2 - listelem 3
On the other hand, with one heading at the beginning it would be faster to type. Also the headings usually stand out cleanly in the text anyway because you create a new paragraph for them. I don't know how that is going with the rule of consistency. The rule could go something like this:
- all static elements that do not resize with incresing number or characters like bold, italic, links etc have always two characters
- all dynamic elements that resize with incresing number of charaters like headings and lists always start with one character.
-- Christoph 28-Aug-06