I've indirectly followed this #Lemmy issue, or rather seen a lot posted about it
It's not the software side of it so much as the #Moderation (or lack, or style thereof) on specific Lemmy instances
Tankies, Neo-Euro-Nazis, homophobia, etc etc
Lax moderation generally
You may need to do some homework beyond just the technical #Federation side of it all
No: I do not have time to provide links for you
cc @feditips