Selectively Suppress Heading Numbering

With the Numbered Reference Macro installed, all headings get an automatically generated header number. I'd like to have a means to suppress the numbering for selected headings or even whole pages. When translated to LaTeX the corresponding chapters, sections, etc should be generated in the starred form, which suppresses the numbering in LaTeX.

Actually, I'd even like to change the default: Most of the Wiki pages look ugly with numbering turned on. I would much prefer to be able to turn on numbering for specific pages with a configurable maximum level for the numbering. To me, e.g., heading numbers with more than two dots are just ugly and confusing.