It's important to distinguish between the blocklists and the general blocking functionality of Bluesky.

The blocklists, as an experiment, are too easily gamed or abused. (I never use them.) List maintainers have added people they have personal beef with, and bad actors have started deceptive lists that change after enough people follow.

But the general block/mute functionality on Bsky is way better than most social media, and goes a long way to avoiding abusive or unpleasant people.