@_elena @pfefferle Yeah, I’d probably start a bit more conservatively, meaning specific, in the terms you want to block. `.social` is indeed quite broad. The mechanism is pretty crude, it has no concept of users or instances—it just matches the terms in the block list with any incoming activity.
I wrote about it on ActivityPub.blog, although reading it back just now, I realized it doesn’t go terribly deep into how it works under the hood.
https://activitypub.blog/2025/05/12/your-site-your-rules-filtering-fediverse-activity/