I'm exploring what to use as a good signal for spam in the context of a relay and I'm leaning towards counting follows vs. mutes. Somebody followed by 20 of my follows but muted by 6 maybe merits an explicit mute from me to be treated as spam? Somebody followed by nobody but muted by 2 ... probably is spam?

I'm implementing nostr:naddr1qq9rzd3h8y6nqwf5xyuqygzxljlrqe027xh8sy2xtyjwfzfrxcll8afxh4hh847psjckhkxwf5psgqqqw4rsty50fx and it will soon be available as a relay, without nip42 as I think it's not well supported by clients yet.