Laurie VossWhat's that you say? Bluesky crossed a few hundred thousand users and immediately started having moderation issues? You don't say! Who could have possibly predicted? etc.
mekka okereke 
In fairness to them, they're trying to build in public, and didn't expect this much attention yet.
They opened their invite-only private beta, where they hoped to control a tiny user list, before they'd even implemented blocks.
Sign-ups are protected by sign-up keys, but unfortunately, they didn't rate-limit their sign-up API, and the keys were quite short, so someone wrote a script to brute-force guess sign-up keys. So some nazis got in. 🤷🏿♂️
Blocks are being implemented this week.
Jorge Stolfi