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this post was submitted on 24 Jul 2023
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While the study itself is a good read and I agree with the conclusions—Mastodon, and decentralized social media need better moderation tools—it’s hard to not read the Verge headline as misleading. One of the study authors gives more context here https://hachyderm.io/@det/110769470058276368. Basically most of the hits came from a large Japanese instance that no one federates with; the author even calls out that the blunt instrument most Mastodon admins use is to blanket defederate with instances hosted in Japan due to their more lax (than the US) laws around CSAM. But the headline seems to imply that there’s a giant seedy underbelly to places like mastodon.social[1] that are rife with abuse material. I suppose that’s a marketing problem of federated software in general.
In my opinion the biggest issue the author points out is that cached materials are sometimes retained even after moderator action. Which honestly just sounds like a straight up bug more than anything. Though if I were running an instance, the feds showing up at my door with a warrant because I've been accidentally distributing CSAM would be my nightmare scenario. And of course jurisdiction plays a part, too: an American user on a Canadian server might see drawn depictions of sexualized minors, think "weird but not illegal," and now the Canadian admin has content that's illegal in Canada on their Canadian server and has no idea.
IMO I think the best solution to this is something similar to what Renaud Chaput (Mastodon's resident infra boffin) described in his recent blog post. Effectively, give admins a way to hand this off to pluggable third-party services. Admins that are worried about this sort of thing can then have some degree of safety via e.g. PhotoDNA, whereas others can take on additional risk and preserve additional privacy.
All that said: yeah the headline makes it sound like .social is some 8chan-esque hellhole, whereas in reality my feed is 99% German programmers sharing milquetoast political takes.
While I agree that CSAM material needs to be addressed it's also worth pointing out that cloudflare has some privacy issues.
The person outright rejects defederation as a solution when it IS the solution, if an instance is in favor of this kind of thing you don't want to federate with them, period.
I also find worrying the amount of calls for a "Fediverse police" in that thread, scanning every image that gets uploaded to your instance with a 3rd party tool is an issue too, on one side you definitely don't want this kinda shit to even touch your servers and on the other you don't want anybody dictating that, say, anti-union or similar memes are marked, denounced and the person who made them marked, targeted and receiving a nice Pinkerton visit.
This is a complicated problem.
Edit: I see somebody suggested checking the observations against the common and well used Mastodon blocklists, to see if the shit is contained on defederated instances, and the author said this was something they wanted to check, so i hope there's a followup
It's the solution in the sense that it removes it from view of users of the mainstream instances. It is not a solution to the overall problem of CSAM and the child abuse that creates such material. There is an argument to be made that is the only responsibility of instance admins, and that past that is the responsibility of law enforcement. This is sensible, but it invites law enforcement to start overtly trawling the Fediverse for offending content, and create an uncomfortable situation for admins and users, as they will go after admins who simply do not have the tools to effectively monitor for CSAM.
Defederation also obviously does not prevent users of the instance from posting CSAM. Admins even unknowingly having CSAM on their instance can easily lead to the admins being prosecuted and the instance taken down. Section 230 does not apply to material illegal on a federal level, and SESTA requires removal of material that violates even state level sex trafficking laws.