tokenizing of forwarded messages

[John McCain]

On Wednesday 05 November 2003 06:05 am, David Relson wrote:
> Mike,
>
> The tokens in the header of the main message get the special tagging,
> i.e. "head:", "from:", "subj:", etc.  Body tokens, i.e. anything after
> the header, do not get the special tagging.  The contents of forwarded
> messages are treated as body tokens.

I'm confused.  Does that mean you can bogofilter -s forwarded messages and 
they will just work - without polluting the database?