most federations have councils or independent regulators to step in so that members don’t lose out by the actions of others. But not the fediverse.

There are at least two technological solutions to that at an end-user level:

• Apps (including webapps) that let people both easily interact with defederated instances, and block instances themselves.
• User migration between instances, which right now are kind of working on Mastodon, and kind of pending on Lemmy/Kbin/etc.

And one at a pro-user level:

• Run your own instance and federate with whoever you wish.

There are proposals for creating "councils" that could keep blacklists, whitelists, chains of trust, and whatever else, but once analyzed more in depth, they all seem to lead to more knee jerk reactions, not less.