snort has a mute all button when you look at muted on others accounts, not quite the same because it just mixes it in with yours… ideally you could try on a list, receive updates, and back out if those updates were not what you signed up for.

nostr:npub1zuuajd7u3sx8xu92yav9jwxpr839cs0kc3q6t56vd5u9q033xmhsk6c2uc listr feature request:

Append someone else’s mute list to my mute list

👀