I thought of this approach, too.

If Alice gives legitimacy to scammer Bob, maybe Alice is a scammer, too? Or she's just gullible. Punishing her a bit and more on repeat violation makes sense in nostr, too. This is an approach a relay that I would want to use (or actually provide) would apply and doesn't mean censorship as Alice can run her own relay or whatever but my relay can't be forced to tolerate promoting scammers.