filtering porn sites with the PICS/RSAC content advisory tags

Has anyone implemented a content filter within squid
using the PICS or RSAC Rules ?

PICS is a system of HTML tags for voluntary rating of web
sites e.g. pornography and violence levels.

Micro$soft IE implements the PICS RSACi ratings system at
the client level, however my company wants to block web sites
at the proxy level using the RSACi tags.

Any ideas ?

More info about PICS can be found at "http://www.w3.org/pics".
The RSACi can be found at "http://www.rsac.org".

-- 
regards,
	michael
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Michael Bochner, Unix Systems Administrator
Ord Minnett Group Ltd, Sydney, Australia
mbochner@ords.com.au