@Crell @jerry speaking of the birdsite, before the API got locked down, I spent a fair amount of effort building network analysis tools to proactively identify and block bigots. Turns out assholes like to follow each other.
It was deeply satisfying when news about me came out and a bunch of people who had never interacted with me and weren't on any shared blocklists were complaining about being blocked by me.
@Crell @jerry I also had an IFF (identify friend or foe) script that would pull following/follower data, compare against my my own block, mute, following, and follower lists, and compute a score.