but if you want an actual answer probably there's an advanced way where you get a following.space list event and pipe all npub tags into a mute event, using nak, jq and awk or just ask AI to make the command

nostr:naddr1qvzqqqyckypzptm5p5vch2acc7uz6zj8rr4n2jan76he4xrrnwzaffw0zdcu4w59qy88wumn8ghj7mn0wvhxcmmv9uq32amnwvaz7tmjv4kxz7fwv3sk6atn9e5k7tcqp3ukwmfkwe6xgupnv9e8se3hpwd