We agreed on the importance of decentralization for censorship resistance.

The same applies for so-called spam. I might call it something else. The point is that it must be at the sole discretion of the relay operator as to what is spam on their relay, and what to do about it. Including just doing nothing.

Users can mute or block it if they choose to do so. It's quick and easy. I do it all the time with my personal account. For example, post in a foreign language that I don't speak or understand are just spam for me.

Unless they've got some great pictures that I do understand lol..🙂