Has anyone integrated a content rating system for their links sites?

One that either checks the headers of the site for pics coding, or one that allows you to content rate (default - unrated) a site.

I've been thinking about it, and for "family safe" links sites, sometimes you have to split hairs.



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POSTCARDS.COM -- Everything Postcards on the Internet www.postcards.com
LinkSQL FAQ: www.postcards.com/FAQ/LinkSQL/

I have a rating system on my site >>>> http://www.nobags.com/pages

Does anyone know how to get the best rating at the top of the listing down to the worst and the bottom???

I was actually asking more of a "content"
rating system, along the lines of PICS or
Safe Surf type ratings.

We are basically a family site, but some links we carry may cross over. It's hard to decide where to draw the line, if you are trying to be an index site, so some sort of content rating system is the logical alternative.