A pink filter (as it is called) is quite effective. Bit racist though. As in name but

Basically can detect shades if flesh colours. I've seen even a version in 2001 catch about 95% of porn or nudity. We experimented with it for photos uploaded the the Dutch version of friends reunited to flag as inappropriate content for review. Rarely missed one and rarely flagged innocent material

Posted By: Steve in Holland, Jul 22, 14:14:48