this post was submitted on 28 Aug 2023
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Probably hashing and scanning any uploaded media against some of the known DBs of CSAM hashes.
Iirc thatβs how Reddit/FB/Insta/Etc. handle it
The sad thing is that all we can usually do is make it harder for attackers. Which is absolutely still worth doing, to be clear. But if an attacker wants to cause trouble badly enough, there's always ways around everything. Eg, image detection can be foiled with enough transformation, account age limits can be gotten past by a patient attacker. Minimum karma can be botted (even easier than ever with AI) and Lemmy is especially easy to bot karma because you can just spin up an instance with all the bots your heart desires. If posts have to be approved, attackers can even just hotlink to innocent images and then change the image after it's approved.
Law enforcement can do a lot more than we can, by subpoenaing ISPs or VPNs. But law enforcement is slow and unreliable, so that's also imperfect.