Not really.
Spam will increasingly grow as nostr grows.
Discussion
Already pretty „spamy“. Clients probably have to implement features to adept for that.
The best design is not to have re-post like coracle.
Second best is to have re-posts as opt-in.
Third best is an option to opt out of re-post functionality.
And I replied to the wrong thread.
Yes, apps and relays play a cat and mouse battle with spam.
Won‘t it also be moral thing. Deciding what is spam and what is no spam, like what’s a truth and what’s a lie?
If you post the same message 100 times in 10 seconds its clear.