Yoggie's Web Filtering is no better nor worse than other services. If you turn family filtering off at Altavista and then search on any ethnic term, screens of porn thumbnails come up (Figure 19). However, when you click on any of the thumbnails, a blocking message pops up (Figure 20). I set the Yoggie Gatekeeper to filter any photo searches, and while images.google.com was immediately locked out, image searches at Altavista were not.
Figure 19: Altavista Image Search with Yoggie Porn and Picture Filtering On
Figure 20: Blocking Error Message after Clicking on Porn Thumbnail
This is too bad. It seems logical that if you know to block the web site, that you would know to block the thumbnail from that web site. But apparently the search enginges are pre-caching thumbnails, which makes blocking them harder to impossible. I don't know why.