I think this is a real problem of "an open network". Disgusting people will find the network and abuse it.

There is a very insightful thread on nostr about it -> https://asknostr.site/question/note1lhvk3kkmaev6qzlpzzns69vw...

The top voted answer was

> Relays have to become more whitelisted and less open, and clients have to implement outbox model and stop relying on 2 or 3 big relays, then we can just stop worrying about this.