Message "Do not check this box without first reviewing with the community on the e-mail list."

Hi, folks:

When editing a concept page,[1] I can across this note:

Examples Section

Not required (suppresses printing of the entire section when checked)Note:
Do not check this box without first reviewing with the community on the
e-mail list. This check box should be used only in rare cases.

Could someone please help me understand: is it OK to add examples to concept
pages? What does this message mean to prevent or encourage?

Thanks much!

Julee 
[1] 
http://docs.webplatform.org/w/index.php?title=css/concepts/overset&action=fo
rmedit
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julee@adobe.com
@adobejulee