I just wanted to reach out to let you know that this may actually be a kbin issue, where your server has been spamming feddit.de and feddit.de has just been acknowledging/relaying your activities.
Since several weeks ago already we have been seeing various issues with massive amounts of activities being sent by kbin instances, primarily kbin.social. Today we (Lemmy.World) have also discovered a kbin.earth user being affected by this and have issued a community ban in one of our communities to remediate the issue and prevent thousands of activities sent from kbin.earth from being relayed through Lemmy.World.
We have so far been unable to establish any communication channel with @ernest, despite trying over multiple channels.
If you wish to perform some research about this, the user account we’ve seen this happen with from kbin.earth is @Oofnik, who we have banned from !world for the time being.
Feel free to reach out to me via matrix at @mrkaplan:lemmy.world directly if you’re looking for more details.