"The bad people" can and will store anything broadcast on Nostr that interests them, for as long as they please, NIP-09 be damned.

It is _polite_ for relays and clients to honour NIP-09 requests, but let's not mistake that for any kind of security.

At best, this could inconvenience bad actors who (a) lack the resources to store everything even short term and (b) who first took an interest in your account AFTER you posted a delete request for your content of concern.

Yeah. Nah.

SSB was very good training there.