Bluesky Moderation and Blocking: How Much Control Do You Actually Have

Most platforms make a single moderation decision and apply it to everyone — accept the rules the company chose, or leave. Bluesky treats moderation as something assembled from separate, interchangeable parts: labelers, mute lists, and block lists that each user combines to match their own comfort level, rather than one policy imposed from above.

Labelers: Moderation as an Open, Subscribable System

A labeler is an independent service — anyone can run one — that scans content across the network and attaches descriptive labels to posts or accounts. The Bluesky app itself reads those labels to decide what to hide, blur, or leave untouched, but which labelers to subscribe to, and how strictly to act on their labels, is up to each user. This means moderation isn't one fixed set of rules baked into the platform — it's closer to a marketplace of moderation philosophies a user can pick from, similar in spirit to the custom feed system covering content discovery.

Mute Lists vs. Block Lists: A Real Distinction

Muting is a private, low-friction way to stop seeing someone's posts without any visible signal to that account — useful for stepping back from a topic or person without an actual confrontation. Blocking is a harder boundary: it prevents interaction entirely, and unlike muting, it's visible to the account being blocked.

Community Block Lists: Delegating Moderation to Others

Beyond individual blocking, Bluesky allows anyone to create a shareable block list and add accounts to it — other users can then subscribe to that list, which filters out content from every account on it and unfollows them automatically. This effectively lets moderation decisions be delegated to a trusted curator rather than made individually for every account, extending the same open, assemble-it-yourself philosophy from labelers to blocking itself.

Traditional platforms centralize moderation into one policy everyone lives under. Bluesky decentralizes it into building blocks anyone can combine — which means two users can have meaningfully different experiences of the same network, based entirely on which labelers and lists they've chosen to trust.

What Recent Research Actually Found

A peer-reviewed study presented at the ACM Web Conference in 2026 analyzed community blocking behavior on Bluesky at scale, and the findings are genuinely counterintuitive. Community blocking is widespread enough that it affects the visibility of more than 90% of content on the platform, at a volume several orders of magnitude higher than official platform takedowns. The accounts most commonly blocked tend to be the most active, popular, and politically engaged users — but blocking doesn't reduce those accounts' overall popularity or activity level, and has only a limited effect on the broader social graph.

Different block lists also target noticeably different kinds of accounts and behavior, rather than converging on the same targets — the study found that models trained per-list could distinguish blocking patterns with high accuracy, meaning each list reflects a distinct, coherent moderation philosophy rather than a generic response to "bad" accounts.

What This Means in Practice

The practical upshot of all this composability is that a Bluesky account's actual experience of the platform is shaped as much by which labelers and lists it subscribes to as by the platform's own baseline moderation, which mainly handles the clearest violations like illegal content and large-scale spam. Two accounts following the exact same people can end up with meaningfully different feeds and moderation experiences, depending entirely on which optional layers they've added on top.

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Bluesky's approach trades the simplicity of one company-wide moderation policy for something more assembled and personal — labelers, mute lists, and shareable block lists that let each user build a moderation experience closer to their own preferences, rather than accepting one set of rules applied uniformly to everyone on the network.