Beehaw has a goal of being a completely troll-free safe place for their members. When the Reddit surge happened, .world and shit just works had open and automated signups, and apparently Beehaw communities saw a lot of harassment from people on those two instances. The mod tools don’t allow them to do much more than defederate, so that’s what they did. They said they intend to refederate when they have tools that allow them to deal with the situation better.