To add more context, currently Lemmy doesn't offer great moderation tools. So if a relatively open instance like lemmy.world interacts with beehaw, beehaw ability to shut down the 'few bad apples' coming from lemmy.world is rudimentary at best.

At a certain point, admins just can't keep up and have to make a judgment call. Either accept that trolls and bad actors are going to get through or cut off the source of the infection, regardless of whether or not that impacts regular users.

Beehaw has already stated that they're open to reconnecting once they have a better way of moderating and dealing with bad actors.