http://commons.wikimedia.org/wiki/Commons:BLP_overwrites
It was chance that the English Wikipedia was the first noticeable target of a "revenge porn" attack. The serious concern about potential public impact started me looking at how to build a report to help address the problem of image overwrites not being "visible" to biography article patrollers. I would be happy to hear of non-English Wikipedia cases that would provide an incentive to extend the report to other projects based on experience. The SQL underpinning the report identifies images of living people by searching relevant categories on the English Wikipedia for images, but several language databases could be added in (I would need local language help in choosing similar categories), with a constraint that it would be nice to keep the report updates within the current 5 minute cycle.
This is a report for Commons hosted images which are used on *all* other projects. The majority of images currently listed are used in many languages, so if they are being overwritten with defamatory material, the internet "footprint" can be extremely large. For a real example, the current report highlights http://commons.wikimedia.org/wiki/File:JohnTerry.JPG which is used on 28 different Wikimedia projects.
Cheers, Fae