To be clear, I don't trust Fedi to handle this information with care, either. Difference being that on Fedi, your mods aren't some VC/blockchain-funded corporate entity. They're often enough your friends, your neighbors, or yourself.
While there are certain database-related exploits which can be used to pull a blocklist, often enough that's a challenge for a typical layperson with an axe to grind. And it's an incomplete picture thanks to the quirks of federation. Not so on Bluesky.