This website hosts a simple Bluesky labeler available at @oneshot.iroiro.party.
Basically, it reads the labels from @moderation.bsky.app, which mostly does post-wise moderation. For every bad post, it marks the user of that post as a bad actor and labels them as such on a user-wise basis. Check out oneshot.iroiro.party for more info.
We also provides a feed that excludes posts from said users (plus a curated block list). You (probably) can find it at oneshot.iroiro.party/feed/oneshot.
The source code is available at gudzpoz/bluesky-oneshot-labeler.