I was recently thinking about how amazing it is that with this decentralized community we would have no censorship from big corporations and then I asked myself: what about illegal content? The kind of content that really should not be shared? As an example, what if someone creates a Lemmy instance and starts creating a community around CP? Or human trafficking? How do we deal with it? I know that instances can choose with whom they can access the content, so if most popular instances blacklist that “illegal” instance its content wouldn’t be easily visible, but it would still be in the Fediverse. Also, will all popular instances have to be quick to blacklist these “illegal” instances? Isn’t that a little to difficult? If we go the other way, where they create a whitelist, wouldn’t that harm small legit instances? Is there a plan to fight off illegal content?
Every instance will have a list of admins in the sidebar on the “main page” (the page the pops up when you just type in the instance domain). And you aren’t warning every admin. Just the admin of the instance you are looking from and (if you want) the admin of the instance you found the illegal material on.
“Law enforcement” would be a better way to phrase it. Your countries higher level law enforcement should have a way to report such things and, one would hope, would have a way to pass that information on to the relevant agency with jurisdiction.
As for a way of reporting a community/instance to the “Fediverse”? Not really. The whole point is that everything is decentralized. It’s up to each instance to decide what is unacceptable for them.