Nostr-Anon on Nostr: BUT... some of "50 NFT owners" sold to another buyer meaning the seller and the buyer ...

BUT... some of "50 NFT owners" sold to another buyer meaning the seller and the buyer has the same posting keys. Get it? You can have a 1000 users who has the same posting keys. The owner of the secret key is probably responsible for the account and she can delete it at anytime. Any thought on this? #nostranon