Is your All really that clogged? I think I’ve blocked 2 or 3 Hexbear communities and now I can’t remember the last time I saw a hexbear post in All.

If it’s that harmful to your experience, I’m sure there are other instances that have already defederated. You could make an account there to start using and even switch back later once the ability to block instances has been added. The point of federation is you have the ability to curate your own experience and there’s less chance for a centralized force to curate your experience for you. Trying to get a large instance to defederate from an instance you disagree is you trying to curate the experience for thousands upon thousands of users.

Personally, I don’t think any instance should defederate from another instance unless the admins of that instance are supportive of hate speech or dangerous language. It seems from this post that the Hexbears admins not only don’t support it but are actively trying to curtail it. Defederating with them will just isolate them and make it easier for that vocal minority to gain control and keep it.