[tzs]

That raises an interesting question: who owns a conversation?

I'm not at all sure how data protection laws, such as GDPR, do or should interact with online messaging systems. For instance, if you ask Google to remove all data they have on you on gmail, do they have to reach into the mailboxes of any other gmail users who have received mail from you and delete those messages?

Or do the recipients count as the ones who are storing that data, so if you want your data out of my mailbox you would have to ask me, not Google?