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Some of you may have noticed a lot of people freaking out about CSAM and a bunch of communities closing, instances restricting registrations, turning off image uploads or shutting down completely. It's a bit of a chaos.

Fortunately your admin has been fighting this fight for the past year so I have developed some tools to help me out. I repurposed one of them to cover lemmy images

Using this approach, I've now turned on automatic scanning of new uploads.

What this means for you is that occasionally you will upload an image for a post and it will stop working after a bit. C'est la vie. Just upload something else. Changing format or slightly altering the image won't help you.

Also, sometimes you might see missing thumbnails on post from other communities. Those were the cached thumbnails hosted by us. The original images should still work in those cases.

Unfortunately this sort of AI scanning is not perfect and due to the nature of the beast, it will catch more false positives but to an acceptable degree. But I find that this is OK for a small social network site run as a hobby project.

Cool? Cool.

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[-] aldalire@lemmy.dbzer0.com 55 points 1 year ago

behavior like this baffle me. I wonder what they stand to gain by spamming CSAM? Purely destructive and psychopath behavior :|

[-] db0@lemmy.dbzer0.com 69 points 1 year ago

Most likely 4channers. They do stuff like that constantly and laugh at the panic

[-] nostalgicgamerz@lemmy.world 9 points 1 year ago

Could be 4chan users or exploding head nazis (since they got defederated because they’re not welcome here)

[-] db0@lemmy.dbzer0.com 10 points 1 year ago

We (thankfully) haven't been targeted yet. This measure is precautionary, due to the issues affecting large instances like lemmy.world, causing potential federation of such content

[-] Luckaneer@lemmy.dbzer0.com 31 points 1 year ago

Cool. Level headed approach.

[-] TheFermentalist@lemm.ee 29 points 1 year ago

Far better to have some false positives than any false negatives

[-] Mojojojo1993@lemmy.world 12 points 1 year ago

Catch and hunt these degenerates. I'd hope law enforcement would get involved. If these sick fucks have these images and have posted them hopefully they can track them and imprison them

[-] Rentlar@lemmy.ca 10 points 1 year ago

Hellllllllll yeaaaaaaaaaaahhhh, my pal db0. Nip that shit in the bud. Hope it's not too energy intensive or use too much computational power.

[-] AceFuzzLord@lemm.ee 10 points 1 year ago

...will catch more false positives but to an acceptable degree.

I'd much rather see it catching plenty of false positives than not because it at least shows it's working as it should.

[-] Nioxic@lemmy.dbzer0.com 6 points 1 year ago

Good work! Thank you!

[-] Geth@lemmy.dbzer0.com 6 points 1 year ago

Hey, thanks for being cool! Really appreciated!

[-] moitoi@lemmy.dbzer0.com 5 points 1 year ago

Thanks for the great job!

I was asking myself if it could be a sort astroturfing? I don't know why but it looks like that to me.

[-] nyakojiru@lemmy.dbzer0.com 4 points 1 year ago

This is perfect moment / place for interpol and other organizations to catch some pedo mother fuckers . Those people are absolute human trash. Also Expect heavy vigilance from big eyes over the fediverse.

[-] technomage1@lemmy.dbzer0.com 2 points 1 year ago

You should also log when, who, and from where these images are being uploaded.

[-] db0@lemmy.dbzer0.com 2 points 1 year ago

That's not possible currently

[-] lambalicious@lemmy.sdf.org 1 points 1 year ago

and due to the nature of the beast, it will catch more false positives but to an acceptable degree

  1. What is this "acceptable degree"? Where is it documented?
  2. What is the recourse for the uploader in case of a false positive? And no I don't mean "upload something else", I mean what do you answer to "my legit content is being classified by a shared internet tool as CSAM, of all things".
this post was submitted on 29 Aug 2023
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