Email has a similar issue yet not quite the same as emails are often directed to specific recipients. Once an email leaves your outbox, it’s out there somewhere and possibly forever. It’s no longer yours even though it has your name, address and signature on it. The right to be forgotten is an illusion that only governments can force individuals and companies to obey with laws and active enforcement. Most companies just write over the existing data to mask PII and don’t really delete anything. We do have a delete mechanism on Nostr but it’s not guaranteed because relays and other clients cannot be forced to comply, so the best we can do is ask nicely. What’s worse is that someone can make a Nostr app that only shows deleted events. Deleting thus has the potential of turning into an Streisand Effect, just bringing more unwanted attention to the deleted event.