It would be better, but I still don't like using "mute" as the criteria because mute does not equal spam.
Discussion
so what if lots of people mute
then you might have mute-bots to silence someone
so let's take some sort of weighted graph of follows
great, we've re-invented the algo but with censorship as the goal
perhaps freedom is the answer
let people host whatever they want to host and mute whoever they want to mute
What if I make a relay that considers a person more of a spammer if they are being followed by more people?