Over 3 years later, "deleted" Facebook photos are still online

Facebook is still working on deleting photos from its servers in a timely manner nearly three years after Ars first brought attention to the topic.
The company admitted on Friday that its older systems for storing uploaded content "did not always delete images from content delivery networks in a reasonable period of time even though they were immediately removed from the site," but said it's currently finishing up a newer system that makes the process much quicker. In the meantime, photos that users thought they "deleted" from the social network months or even years ago remain accessible via direct link.
The problem: "deleted" photos never go away
When we first investigated this phenomenon in 2009, we discovered that photos "deleted" from Facebook seemingly never go away if you have a direct link to the image file on Facebook's servers. Users who might have had second thoughts about posting a photo -- whether it was because they didn't want retaliation from an employer, wanted to avoid family drama, or uploaded a photo of a friend without their permission—could certainly remove the image from Facebook's main user interface, but as long as someone had a direct link to the .jpg file in question, the photo would remain accessible for an indefinite amount of time. When we asked Facebook about it, we were told that the company was "working with our content delivery network (CDN) partner to significantly reduce the amount of time that backup copies persist."
But when we followed up on the story more than a year later, our "deleted" photos were still accessible via direct link. That's when the reader stories started pouring in: we were told horror stories about online harassment using photos that were allegedly deleted years ago, and users who were asked to take down photos of friends that they had put online.

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