If this is helpful to anyone, I recently made a tool that lets you copy blocklists from Mastodon servers that publicly share this information in a format that can be imported to your own server, if you're an admin.
A use case for this would be: I trust the admin of XYZ.social, l want to block all the same servers they're blocking.
https://stefanbohacek.com/project/mastodon-domain-block-exporter-script/
#fediverse #MastoAdmin #MastoAdmins #safety #FediblockMeta #DomainBlocks