Btw regarding your email position: SMTP relayers like Postfix/Sendmail don’t filter content. Filtering is an application-layer choice, not part of the protocol.
Discussion
Hypothetically, wouldnt it really suck if bots spammed you all day on nostr with junk so you could almost never see anything legitimate on your feed? Maybe you could try to block them? But nostr is a protocol right? You wouldn't do that for censorship reasons
There’s an interesting piece of this debate that hasn’t really been addressed. Bitcoin Core/Knots are simultaneously clients and protocol relayers. At the protocol level there should be no filtering IMO, client level different story but that should be up to each individual. More implementations the better, I don’t think the Knots one is productive… but like run whatever you want man.