How will Lemmy handle illegal content like drug dealing, child porn, snuff movies etc? On Reddit, the corporation is accountable so they will make an effort to ensure non of this exists on their platform. And they would face legal troubles if they failed to act.
But as Lemmy is decentralised this isn’t really possible. Sure the main instances can defederate from bad instances, but those instances could still operate and be accessible on the web. Especially if they’re hosted in countries outside of the western sphere of influence. Multiple bad instances could federate and duplicate the illegal content pretty easily, making it difficult for the authorities to keep it shut down. Has this been thought about already?
There are far easier, more secure ways for people sharing, say, child porn to do so than hosting a Lemmy instance. The only real benefit of a Lemmy instance would be the ease of use.
A Lemmy instance is just a website, possibly running on someone’s basement server rack. There’s no way for any authority to stop them from hosting child porn on that server, unless that authority is (1). Their ISP or (2). The police.
Lemmy (or, rather, ActivityPub) is just an internet protocol, like Email. You can’t stop someone from hosting child porn on a Lemmy instance just like you can’t stop someone from sending child porn over email. This is not a reason that Lemmy should not exist in the same way it’s not a reason for secure, encrypted email to not exist. Enforcement falls to traditional, (supposedly) accountable authorities, which is much better than it falling to administrators of a private company.